100个Java经典例证

2012-10-08

100个Java经典例子package?test11????import?java.awt.event.ActionEvent??import?java.awt.event.Actio

100个Java经典例子

package?test11;????
import?java.awt.event.ActionEvent;??import?java.awt.event.ActionListener;??
import?java.awt.event.KeyEvent;????
import?javax.swing.AbstractButton;??import?javax.swing.ImageIcon;??
import?javax.swing.JButton;??import?javax.swing.JFrame;??
import?javax.swing.JPanel;????
/**??*?Title:?按钮演示?
?*?Description:?提供一个按钮的演示。如何实现按钮和是一个按钮失效??*?Filename:??
?*/??public?class?ButtonDemo?extends?JPanel??
????????????????????????implements?ActionListener?{????????
????private?static?final?long?serialVersionUID?=?1L;??????protected?JButton?b1,?b2,?b3;??
/**??*方法说明：构造器，初始图形界面构建?
?*/??????public?ButtonDemo()?{??
????????ImageIcon?leftButtonIcon?=?createImageIcon("images/right.gif");??????????ImageIcon?middleButtonIcon?=?createImageIcon("images/middle.gif");??
????????ImageIcon?rightButtonIcon?=?createImageIcon("images/left.gif");????
????????b1?=?new?JButton("失效中间按钮(D)",?leftButtonIcon);??????????b1.setVerticalTextPosition(AbstractButton.CENTER);//水平中间对齐??
????????b1.setHorizontalTextPosition(AbstractButton.LEADING);//相当于LEFT??????????b1.setMnemonic(KeyEvent.VK_D);//将b1邦定alt+D键??
????????b1.setActionCommand("disable");????
????????b2?=?new?JButton("M中间按钮",?middleButtonIcon);??????????b2.setVerticalTextPosition(AbstractButton.BOTTOM);??
????????b2.setHorizontalTextPosition(AbstractButton.CENTER);??????????b2.setMnemonic(KeyEvent.VK_M);//将b2邦定alt+M键??
??????????b3?=?new?JButton("E激活中间按钮",?rightButtonIcon);??
????????b3.setMnemonic(KeyEvent.VK_E);//将b3邦定alt+E键??????????b3.setActionCommand("enable");??
????????b3.setEnabled(false);????
????????//给1和3添加事件监听??????????b1.addActionListener(this);??
????????b3.addActionListener(this);??????????//设置按钮提示文本??
????????b1.setToolTipText("点击这个按钮，将使中间的按钮失效！");??????????b2.setToolTipText("点击这个按钮，没有任何的事件发生！");??
????????b3.setToolTipText("点击这个按钮，将使中间的按钮有效");????
????????//将按钮添加到JPanel中??????????add(b1);??
????????add(b2);??????????add(b3);??
????}??/**?
?*方法说明：事件处理??*/??
????public?void?actionPerformed(ActionEvent?e)?{??????????if?("disable".equals(e.getActionCommand()))?{??
????????????b2.setEnabled(false);??????????????b1.setEnabled(false);??
????????????b3.setEnabled(true);??????????}?else?{??
????????????b2.setEnabled(true);??????????????b1.setEnabled(true);??
????????????b3.setEnabled(false);??????????}??
????}??/**?
?*方法说明：创建图标，??*输入参数：String?path?图标所在的路径?
?*返回类型：ImageIcon?图标对象??*/??
????protected?static?ImageIcon?createImageIcon(String?path)?{??????????java.net.URL?imgURL?=?ButtonDemo.class.getResource(path);??
????????if?(imgURL?!=?null)?{??????????????return?new?ImageIcon(imgURL);??
????????}?else?{??????????????System.err.println("Couldn't?find?file:?"?+?path);??
????????????return?null;??????????}??
????}??/**?
?*方法说明：主方法??*/??
????public?static?void?main(String[]?args)?{??????????//设置使用新的swing界面??
????????JFrame.setDefaultLookAndFeelDecorated(true);????
????????//创建一个窗体??????????JFrame?frame?=?new?JFrame("ButtonDemo");??
????????frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);????
????????//创建一个面板??????????ButtonDemo?newContentPane?=?new?ButtonDemo();??
????????newContentPane.setOpaque(true);???????????frame.setContentPane(newContentPane);??
??????????//显示窗体??
????????frame.pack();??????????frame.setVisible(true);??
????}??}??

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package?test12;????
import?java.awt.*;??import?java.awt.event.*;??
import?javax.swing.*;??/**?
?*?Title:?检查盒演示??*?Description:?选择不同的选择框显示不同的图片?
?*?Filename:?CheckBoxDemo.java<??*/??
public?class?CheckBoxDemo?extends?JPanel????????????????????????????implements?ItemListener?{??
?????????private?static?final?long?serialVersionUID?=?1L;??
????JCheckBox?chinButton;??????JCheckBox?glassesButton;??
????JCheckBox?hairButton;??????JCheckBox?teethButton;??
??????/*?
?????*?有四个检查盒，分别对应下巴、眼镜、头发和牙齿??????*?图片不是拼出来的，而是根据检查盒选择拼写图片文件名?
?????*?图片文件名的定义格式为"geek-XXXX.gif"??????*?其中?XXXX?根据检查盒的不同选择，而不同。它的格式如下：?
????????----?????????????//没有选择?
????????c---?????????????//一个选择?
???????-g--????????--h-?
???????---t??
???????cg--?????????????//两个选择????????c-h-?
???????c--t????????-gh-?
???????-g-t????????--ht?
????????-ght?????????????//三个选择?
???????c-ht????????cg-t?
???????cgh-??
???????cght?????????????//所有都选??????*/??
??????StringBuffer?choices;??
????JLabel?pictureLabel;????
????public?CheckBoxDemo()?{??????????super(new?BorderLayout());??
??????????//创建检查盒??
????????chinButton?=?new?JCheckBox("下巴(c)");??????????chinButton.setMnemonic(KeyEvent.VK_C);??
????????chinButton.setSelected(true);????
????????glassesButton?=?new?JCheckBox("眼镜(g)");??????????glassesButton.setMnemonic(KeyEvent.VK_G);??
????????glassesButton.setSelected(true);????
????????hairButton?=?new?JCheckBox("头发(h)");??????????hairButton.setMnemonic(KeyEvent.VK_H);??
????????hairButton.setSelected(true);????
????????teethButton?=?new?JCheckBox("牙齿(t)");??????????teethButton.setMnemonic(KeyEvent.VK_T);??
????????teethButton.setSelected(true);????
????????//给检查盒添加监听??????????chinButton.addItemListener(this);??
????????glassesButton.addItemListener(this);??????????hairButton.addItemListener(this);??
????????teethButton.addItemListener(this);????
????????choices?=?new?StringBuffer("cght");????
????????//放置一个带图片的标签??????????pictureLabel?=?new?JLabel();??
????????pictureLabel.setFont(pictureLabel.getFont().deriveFont(Font.ITALIC));??????????updatePicture();??
??????????//将检查盒放置到面版中??
????????JPanel?checkPanel?=?new?JPanel(new?GridLayout(0,?1));??????????checkPanel.add(chinButton);??
????????checkPanel.add(glassesButton);??????????checkPanel.add(hairButton);??
????????checkPanel.add(teethButton);????
????????add(checkPanel,?BorderLayout.LINE_START);??????????add(pictureLabel,?BorderLayout.CENTER);??
????????setBorder(BorderFactory.createEmptyBorder(20,20,20,20));??????}??
/**??* 方法说明：监听检查盒事件，拼凑图片的文件名XXXX部分?
?* 输入参数：??* 返回类型：?
?*/??????public?void?itemStateChanged(ItemEvent?e)?{??
????????int?index?=?0;??????????char?c?=?'-';??
????????Object?source?=?e.getItemSelectable();????
????????if?(source?==?chinButton)?{??????????????index?=?0;??
????????????c?=?'c';??????????}?else?if?(source?==?glassesButton)?{??
????????????index?=?1;??????????????c?=?'g';??
????????}?else?if?(source?==?hairButton)?{??????????????index?=?2;??
????????????c?=?'h';??????????}?else?if?(source?==?teethButton)?{??
????????????index?=?3;??????????????c?=?'t';??
????????}????????????
????????//取消选择事件??????????if?(e.getStateChange()?==?ItemEvent.DESELECTED)?{??
????????????c?=?'-';??????????}??
??????????//改变文件名字XXXX??
????????choices.setCharAt(index,?c);????
????????updatePicture();??????}??
/**??* 方法说明：绘制图片?
?* 输入参数：??* 返回类型：?
?*/??????protected?void?updatePicture()?{??
????????//将得到的图片制成图标??????????ImageIcon?icon?=?createImageIcon(??
????????????????????????????????????"images/geek/geek-"??????????????????????????????????????+?choices.toString()??
????????????????????????????????????+?".gif");??????????pictureLabel.setIcon(icon);??
????????pictureLabel.setToolTipText(choices.toString());??????????if?(icon?==?null)?{??
????????????pictureLabel.setText("没有发现图片");??????????}?else?{??
????????????pictureLabel.setText(null);??????????}??
????}??/**?
?* 方法说明：获取图标??* 输入参数：String?path?图片路径?
?* 返回类型：ImageIcon对象??*/??
????protected?static?ImageIcon?createImageIcon(String?path)?{??????????java.net.URL?imgURL?=?CheckBoxDemo.class.getResource(path);??
????????if?(imgURL?!=?null)?{??????????????return?new?ImageIcon(imgURL);??
????????}?else?{??????????????System.err.println("Couldn't?find?file:?"?+?path);??
????????????return?null;??????????}??
????}??/**?
?* 方法说明：主方法??* 输入参数：?
?* 返回类型：??*/??
????public?static?void?main(String?s[])?{???????????JFrame.setDefaultLookAndFeelDecorated(true);??
??????????//创建一个窗体，??
????????JFrame?frame?=?new?JFrame("CheckBoxDemo");??????????frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);??
??????????//创建一个面板??
????????JComponent?newContentPane?=?new?CheckBoxDemo();??????????newContentPane.setOpaque(true);??
????????frame.setContentPane(newContentPane);????
????????//显示窗体??????????frame.pack();??
????????frame.setVisible(true);??????}??
}??

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package?test13;????
import?java.awt.*;??import?java.awt.event.*;??
import?javax.swing.*;??import?java.util.*;??
import?java.text.SimpleDateFormat;??/**?
?*?Title:?ComboBox下拉域演示??*?Description:?通过选择或这输入一种日期格式来格式化今天的日期?
?*?Filename:?ComboBoxDemo.java??*/??
??public?class?ComboBoxDemo?extends?JPanel??
???????????????????????????implements?ActionListener?{????
????private?static?final?long?serialVersionUID?=?1L;??????static?JFrame?frame;??
????JLabel?result;??????String?currentPattern;??
/**??*方法说明：构造器。初始化窗体构件?
?*/??????public?ComboBoxDemo()?{??
????????setLayout(new?BoxLayout(this,?BoxLayout.PAGE_AXIS));??????????String[]?patternExamples?=?{??
?????????????????"dd?MMMMM?yyyy",???????????????????"dd.MM.yy",??
?????????????????"MM/dd/yy",???????????????????"yyyy.MM.dd?G?'at'?hh:mm:ss?z",??
?????????????????"EEE,?MMM?d,?''yy",???????????????????"h:mm?a",??
?????????????????"H:mm:ss:SSS",???????????????????"K:mm?a,z",??
?????????????????"yyyy.MMMMM.dd?GGG?hh:mm?aaa"???????????????????};??
??????????currentPattern?=?patternExamples[0];??
??????????//设置一个规范的用户界面??
????????JLabel?patternLabel1?=?new?JLabel("输入一个字符格式或者");??????????JLabel?patternLabel2?=?new?JLabel("从下拉列表中选择一种：");??
??????????JComboBox?patternList?=?new?JComboBox(patternExamples);??
????????patternList.setEditable(true);//标注这里ComboBox可进行编辑??????????patternList.addActionListener(this);??
??????????//创建一个显示结果用户界面??
????????JLabel?resultLabel?=?new?JLabel("当前?日期/时间",??????????????????????????????????????????JLabel.LEADING);//相当于LEFT??
????????result?=?new?JLabel("?");??????????result.setForeground(Color.black);??
????????result.setBorder(BorderFactory.createCompoundBorder(???????????????BorderFactory.createLineBorder(Color.black),??
?????????????BorderFactory.createEmptyBorder(5,5,5,5)??????????));??
??????????//布置构件??
????????JPanel?patternPanel?=?new?JPanel();??????????patternPanel.setLayout(new?BoxLayout(patternPanel,??
???????????????????????????????BoxLayout.PAGE_AXIS));??????????patternPanel.add(patternLabel1);??
????????patternPanel.add(patternLabel2);??????????patternList.setAlignmentX(Component.LEFT_ALIGNMENT);??
????????patternPanel.add(patternList);????
????????JPanel?resultPanel?=?new?JPanel(new?GridLayout(0,?1));??????????resultPanel.add(resultLabel);??
????????resultPanel.add(result);????
????????patternPanel.setAlignmentX(Component.LEFT_ALIGNMENT);??????????resultPanel.setAlignmentX(Component.LEFT_ALIGNMENT);??
??????????add(patternPanel);??
????????add(Box.createRigidArea(new?Dimension(0,?10)));??????????add(resultPanel);??
??????????setBorder(BorderFactory.createEmptyBorder(10,10,10,10));??
??????????reformat();??
????}???/**?
?*方法说明：事件处理??*/??
????public?void?actionPerformed(ActionEvent?e)?{??????????JComboBox?cb?=?(JComboBox)e.getSource();??
????????String?newSelection?=?(String)cb.getSelectedItem();??????????currentPattern?=?newSelection;??
????????reformat();??????}??
/**??*方法说明：格式和显示今天的日期?
?*/??????public?void?reformat()?{??
????????Date?today?=?new?Date();??????????SimpleDateFormat?formatter?=??
???????????new?SimpleDateFormat(currentPattern);??????????try?{??
????????????String?dateString?=?formatter.format(today);??????????????result.setForeground(Color.black);??
????????????result.setText(dateString);??????????}?catch?(IllegalArgumentException?iae)?{??
????????????result.setForeground(Color.red);??????????????result.setText("Error:?"?+?iae.getMessage());??
????????}??????}??
/**??*方法说明：主方法?
?*/??????public?static?void?main(String[]?args)?{??
????????JFrame.setDefaultLookAndFeelDecorated(true);????
????????//创建一个窗体??????????frame?=?new?JFrame("ComboBoxDemo");??
????????frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);????
????????//创建一个面版容器??????????JComponent?newContentPane?=?new?ComboBoxDemo();??
????????newContentPane.setOpaque(true);??????????frame.setContentPane(newContentPane);??
??????????//显示窗体??
????????frame.pack();??????????frame.setVisible(true);??
????}??}??

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package?test14;????
import?java.awt.*;??import?java.awt.event.*;??
import?javax.swing.*;??import?javax.swing.event.*;??
/**??*?Title:?列表框?
?*?Description:?通过输入框添加元素和点击“删除”按钮删除列表元素??*?Filename:?ListDemo.java?
?*/??public?class?ListDemo?extends?JPanel??
??????????????????????implements?ListSelectionListener?{??????private?static?final?long?serialVersionUID?=?1L;??
????private?JList?list;??????private?DefaultListModel?listModel;??
??????private?static?final?String?hireString?=?"添加";??
????private?static?final?String?fireString?=?"删除";??????private?JButton?fireButton;??
????private?JTextField?employeeName;????
????public?ListDemo()?{??????????super(new?BorderLayout());??
????????//构建List的列表元素??????????listModel?=?new?DefaultListModel();??
????????listModel.addElement("Alan?Sommerer");??????????listModel.addElement("Alison?Huml");??
????????listModel.addElement("Kathy?Walrath");??????????listModel.addElement("Lisa?Friendly");??
????????listModel.addElement("Mary?Campione");??????????listModel.addElement("Sharon?Zakhour");??
??????????//创建一个List构件,并将列表元素添加到列表中??
????????list?=?new?JList(listModel);??????????//设置选择模式为单选??
????????list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);??????????//初始化选择索引在0的位置，即第一个元素??
????????list.setSelectedIndex(0);??????????list.addListSelectionListener(this);??
????????//设置列表可以同时看5个元素??????????list.setVisibleRowCount(5);??
????????//给列表添加一个滑动块??????????JScrollPane?listScrollPane?=?new?JScrollPane(list);??
??????????JButton?hireButton?=?new?JButton(hireString);??
????????HireListener?hireListener?=?new?HireListener(hireButton);??????????hireButton.setActionCommand(hireString);??
????????hireButton.addActionListener(hireListener);??????????hireButton.setEnabled(false);??
??????????fireButton?=?new?JButton(fireString);??
????????fireButton.setActionCommand(fireString);??????????fireButton.addActionListener(new?FireListener());??
??????????employeeName?=?new?JTextField(10);??
????????employeeName.addActionListener(hireListener);??????????employeeName.getDocument().addDocumentListener(hireListener);??
????????@SuppressWarnings("unused")??????????String?name?=?listModel.getElementAt(??
??????????????????????????????list.getSelectedIndex()).toString();????
????????//创建一个面板??????????JPanel?buttonPane?=?new?JPanel();??
????????buttonPane.setLayout(new?BoxLayout(buttonPane,?????????????????????????????????????????????BoxLayout.LINE_AXIS));??
????????buttonPane.add(fireButton);??????????buttonPane.add(Box.createHorizontalStrut(5));??
????????buttonPane.add(new?JSeparator(SwingConstants.VERTICAL));??????????buttonPane.add(Box.createHorizontalStrut(5));??
????????buttonPane.add(employeeName);??????????buttonPane.add(hireButton);??
????????buttonPane.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));????
????????add(listScrollPane,?BorderLayout.CENTER);??????????add(buttonPane,?BorderLayout.PAGE_END);??
????}??/**?
?*类说明：“添加”按钮监听??*类描述：当点击“添加”按钮后，实现将元素添加到列表框中?
?*/??????class?FireListener?implements?ActionListener?{??
????????public?void?actionPerformed(ActionEvent?e)?{???????????????
????????????int?index?=?list.getSelectedIndex();??????????????listModel.remove(index);??
??????????????int?size?=?listModel.getSize();??
??????????????if?(size?==?0)?{?//如果没有了选择项，则是“删除”按钮实效??
????????????????fireButton.setEnabled(false);????
????????????}?else?{?//选择了一个??????????????????if?(index?==?listModel.getSize())?{??
????????????????????//移除选项??????????????????????index--;??
????????????????}????
????????????????list.setSelectedIndex(index);??????????????????list.ensureIndexIsVisible(index);??
????????????}??????????}??
????}????
/**??*类说明：“删除”按钮监听事件?
?*类描述：实现删除列表元素??*/??
????class?HireListener?implements?ActionListener,?DocumentListener?{??????????private?boolean?alreadyEnabled?=?false;??
????????private?JButton?button;????
????????public?HireListener(JButton?button)?{??????????????this.button?=?button;??
????????}????
????????//必须实现?ActionListener.??????????public?void?actionPerformed(ActionEvent?e)?{??
????????????String?name?=?employeeName.getText();????
????????????//如果输入空或有同名??????????????if?(name.equals("")?||?alreadyInList(name))?{??
????????????????Toolkit.getDefaultToolkit().beep();??????????????????employeeName.requestFocusInWindow();??
????????????????employeeName.selectAll();??????????????????return;??
????????????}????
????????????int?index?=?list.getSelectedIndex();?//获取选择项??????????????if?(index?==?-1)?{?//如果没有选择，就插入到第一个??
????????????????index?=?0;??????????????}?else?{???????????//如果有选择，那么插入到选择项的后面??
????????????????index++;??????????????}??
??????????????listModel.insertElementAt(employeeName.getText(),?index);??
???????????????//重新设置文本??
????????????employeeName.requestFocusInWindow();??????????????employeeName.setText("");??
??????????????//选择新的元素，并显示出来??
????????????list.setSelectedIndex(index);??????????????list.ensureIndexIsVisible(index);??
????????}??/**?
?*方法说明：检测是否在LIST中有重名元素??*输入参数：String?name?检测的名字?
?*返回类型：boolean?布尔值，如果存在返回true??*/??
??????????protected?boolean?alreadyInList(String?name)?{??
????????????return?listModel.contains(name);??????????}??
??/**?
?*方法说明：实现DocumentListener接口，必需实现的方法：??*/??
????????public?void?insertUpdate(DocumentEvent?e)?{??????????????enableButton();??
????????}????
/**??*方法说明：实现DocumentListener接口，必需实现的方法?
?*/??????????public?void?removeUpdate(DocumentEvent?e)?{??
????????????handleEmptyTextField(e);??????????}??
??/**?
?*方法说明：实现DocumentListener接口，必需实现的方法??*/??
????????public?void?changedUpdate(DocumentEvent?e)?{??????????????if?(!handleEmptyTextField(e))?{??
????????????????enableButton();??????????????}??
????????}??/**?
?*方法说明：按钮使能??*/??
????????private?void?enableButton()?{??????????????if?(!alreadyEnabled)?{??
????????????????button.setEnabled(true);??????????????}??
????????}??/**?
?*方法说明：实现DocumentListener接口，必需实现的方法，修改按钮的状态??*/??
????????private?boolean?handleEmptyTextField(DocumentEvent?e)?{??????????????if?(e.getDocument().getLength()?<=?0)?{??
????????????????button.setEnabled(false);??????????????????alreadyEnabled?=?false;??
????????????????return?true;??????????????}??
????????????return?false;??????????}??
????}??/**?
?*方法说明：实现ListSelectionListener接口，必需实现的方法：??*/??
????public?void?valueChanged(ListSelectionEvent?e)?{??????????if?(e.getValueIsAdjusting()?==?false)?{??
??????????????if?(list.getSelectedIndex()?==?-1)?{??
????????????????fireButton.setEnabled(false);????
????????????}?else?{??????????????????fireButton.setEnabled(true);??
????????????}??????????}??
????}??/**?
?*方法说明：主方法??*/??
????public?static?void?main(String[]?args)?{????
????????JFrame.setDefaultLookAndFeelDecorated(true);????
????????//创建一个窗体??????????JFrame?frame?=?new?JFrame("ListDemo");??
????????frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);????
????????//创建一个面版??????????JComponent?newContentPane?=?new?ListDemo();??
????????newContentPane.setOpaque(true);??????????frame.setContentPane(newContentPane);??
??????????//显示窗体??
????????frame.pack();??????????frame.setVisible(true);??
????}??}??

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package?test15;????
import?javax.swing.JTabbedPane;??import?javax.swing.ImageIcon;??
import?javax.swing.JLabel;??import?javax.swing.JPanel;??
import?javax.swing.JFrame;??/**?
?*?Title:?选项卡演示??*?Description:?这里是一个选项卡演示，点击不同的卡片，显示的内容不同?
?*?Filename:?TabbedPaneDemo.java??*/??
import?java.awt.*;????
public?class?TabbedPaneDemo?extends?JPanel?{??????/**?
?????*???????*/??
????private?static?final?long?serialVersionUID?=?1L;????
????public?TabbedPaneDemo()?{??????????super(new?GridLayout(1,?1));??
??????????ImageIcon?icon?=?createImageIcon("images/middle.gif");??
????????JTabbedPane?tabbedPane?=?new?JTabbedPane();????
????????Component?panel1?=?makeTextPanel("#第一个卡片#");??????????tabbedPane.addTab("One",?icon,?panel1,??
??????????????????????????"第一个卡片提示信息！");??????????tabbedPane.setSelectedIndex(0);??
??????????Component?panel2?=?makeTextPanel("##第二个卡片##");??
????????tabbedPane.addTab("Two",?icon,?panel2,????????????????????????????"第二个卡片提示信息！");??
??????????Component?panel3?=?makeTextPanel("###第三个卡片###");??
????????tabbedPane.addTab("Three",?icon,?panel3,????????????????????????????"第三个卡片提示信息！");??
??????????Component?panel4?=?makeTextPanel("####第四个卡片####");??
????????tabbedPane.addTab("Four",?icon,?panel4,????????????????????????????"第四个卡片提示信息！");??
??????????//将选项卡添加到panl中??
????????add(tabbedPane);??????}??
/**??*方法说明：添加信息到选项卡中?
?*输入参数：String?text?显示的信息内容??*返回类型：Component?成员对象?
?*/??????protected?Component?makeTextPanel(String?text)?{??
????????JPanel?panel?=?new?JPanel(false);??????????JLabel?filler?=?new?JLabel(text);??
????????filler.setHorizontalAlignment(JLabel.CENTER);??????????panel.setLayout(new?GridLayout(1,?1));??
????????panel.add(filler);??????????return?panel;??
????}??/**?
?*方法说明：获得图片??*输入参数：String?path?图片的路径?
?*返回类型：ImageIcon?图片对象??*/??
????protected?static?ImageIcon?createImageIcon(String?path)?{??????????java.net.URL?imgURL?=?TabbedPaneDemo.class.getResource(path);??
????????if?(imgURL?!=?null)?{??????????????return?new?ImageIcon(imgURL);??
????????}?else?{??????????????System.err.println("Couldn't?find?file:?"?+?path);??
????????????return?null;??????????}??
????}????
????public?static?void?main(String[]?args)?{??????????//使用Swing窗体描述??
????????JFrame.setDefaultLookAndFeelDecorated(true);????
????????//创建窗体??????????JFrame?frame?=?new?JFrame("TabbedPaneDemo");??
????????frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);??????????frame.getContentPane().add(new?TabbedPaneDemo(),??
?????????????????????????????????BorderLayout.CENTER);????
????????//显示窗体??????????frame.setSize(400,?200);??
????????frame.setVisible(true);??????}??
}??

view plain

package?test16;????
import?javax.swing.JOptionPane;??import?javax.swing.JDialog;??
import?javax.swing.JTextField;??import?java.beans.*;?//property?change?stuff??
import?java.awt.*;??import?java.awt.event.*;??
/**??*?Title:?用户自定义对话框?
?*?Description:?自己定义对话框的风格。这使得对话框的样式更加多样化??*?Filename:?CustomDialog.java?
?*/??class?CustomDialog?extends?JDialog??
???????????????????implements?ActionListener,????????????????????????????????PropertyChangeListener?{??
??????private?static?final?long?serialVersionUID?=?1L;??
????private?String?typedText?=?null;??????private?JTextField?textField;??
????private?DialogDemo?dd;????
????private?String?magicWord;??????private?JOptionPane?optionPane;??
??????private?String?btnString1?=?"确定";??
????private?String?btnString2?=?"取消";??/**?
?*方法说明：返回文本输入字符??*/??
????public?String?getValidatedText()?{??????????return?typedText;??
????}??/**?
?*方法说明：创建一个结果对话框??*/??
????public?CustomDialog(Frame?aFrame,?String?aWord,?DialogDemo?parent)?{??????????super(aFrame,?true);??
????????dd?=?parent;????????????
????????magicWord?=?aWord.toUpperCase();??????????setTitle("测试");??
??????????textField?=?new?JTextField(10);??
??????????//定义显示信息??
????????String?msgString1?=?"李先生：?jeck是你的英文名字吗？";??????????String?msgString2?=?"(这个答案是：?""?+?magicWord??
??????????????????????????????+?""。)";??????????Object[]?array?=?{msgString1,?msgString2,?textField};??
????
????????Object[]?options?=?{btnString1,?btnString2};????
????????//创建对话框??????????optionPane?=?new?JOptionPane(array,??
????????????????????????????????????JOptionPane.QUESTION_MESSAGE,??????????????????????????????????????JOptionPane.YES_NO_OPTION,??
????????????????????????????????????null,??????????????????????????????????????options,??
????????????????????????????????????options[0]);????
????????//显示对话框??????????setContentPane(optionPane);??
??????????//设置当关闭窗体动作模式??
????????setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);??????????addWindowListener(new?WindowAdapter()?{??
????????????????public?void?windowClosing(WindowEvent?we)?{????????????????????
????????????????????optionPane.setValue(new?Integer(??????????????????????????????????????????JOptionPane.CLOSED_OPTION));??
????????????}??????????});??
??????????//使的文本输入域得到焦点??
????????addComponentListener(new?ComponentAdapter()?{??????????????public?void?componentShown(ComponentEvent?ce)?{??
????????????????textField.requestFocusInWindow();??????????????}??
????????});????
????????//给文本域添加监听事件??????????textField.addActionListener(this);??
??????????//监听输入改变??
????????optionPane.addPropertyChangeListener(this);??????}??
??????/**?文本域监听处理?*/??
????public?void?actionPerformed(ActionEvent?e)?{??????????optionPane.setValue(btnString1);??
????}????
????/**?监听输入的改变?*/??????public?void?propertyChange(PropertyChangeEvent?e)?{??
????????String?prop?=?e.getPropertyName();????
????????if?(isVisible()???????????&&?(e.getSource()?==?optionPane)??
?????????&&?(JOptionPane.VALUE_PROPERTY.equals(prop)?||???????????????JOptionPane.INPUT_VALUE_PROPERTY.equals(prop)))?{??
????????????Object?value?=?optionPane.getValue();????
????????????if?(value?==?JOptionPane.UNINITIALIZED_VALUE)?{???????????????????return;??
????????????}????
????????????optionPane.setValue(??????????????????????JOptionPane.UNINITIALIZED_VALUE);??
??????????????if?(btnString1.equals(value))?{??
????????????????????typedText?=?textField.getText();??????????????????String?ucText?=?typedText.toUpperCase();??
????????????????if?(magicWord.equals(ucText))?{??????????????????????//如果输入有效，则清楚文本域并隐藏对话框??
????????????????????clearAndHide();??????????????????}?else?{??
????????????????????//文本输入无效??????????????????????textField.selectAll();??
????????????????????JOptionPane.showMessageDialog(??????????????????????????????????????CustomDialog.this,??
????????????????????????????????????"对不起,?""?+?typedText?+?""?"??????????????????????????????????????+?"是无效的输入。\n"??
????????????????????????????????????+?"请重新输入"??????????????????????????????????????+?magicWord?+?".",??
????????????????????????????????????"再试一次",??????????????????????????????????????JOptionPane.ERROR_MESSAGE);??
????????????????????typedText?=?null;??????????????????????textField.requestFocusInWindow();??
????????????????}??????????????}?else?{?//用户关闭了对话框或点击了“cancel”??
????????????????dd.setLabel("好吧！?"???????????????????????????+?"我们不能影响你的决定输入"??
?????????????????????????+?magicWord?+?"。");??????????????????typedText?=?null;??
????????????????clearAndHide();??????????????}??
????????}??????}??
/**??*方法说明：清楚文本域并隐藏痘翱蝌?
??*/??
????public?void?clearAndHide()?{??????????textField.setText(null);??
????????setVisible(false);??????}??
}??

view plain

package?test16;????
import?javax.swing.JOptionPane;??import?javax.swing.JDialog;??
import?javax.swing.JButton;??import?javax.swing.JRadioButton;??
import?javax.swing.ButtonGroup;??import?javax.swing.JLabel;??
import?javax.swing.ImageIcon;??import?javax.swing.BoxLayout;??
import?javax.swing.Box;??import?javax.swing.BorderFactory;??
import?javax.swing.border.Border;??import?javax.swing.JTabbedPane;??
import?javax.swing.JPanel;??import?javax.swing.JFrame;??
import?java.beans.*;???import?java.awt.*;??
import?java.awt.event.*;????
/**??*Title:?对话框演示?
?*Description:?全面的演示各种类型的对话框的使用??*Filename:?DialogDemo.java?
?*/??public?class?DialogDemo?extends?JPanel?{??
??????private?static?final?long?serialVersionUID?=?1L;??
????JLabel?label;??????ImageIcon?icon?=?createImageIcon("images/middle.gif");??
????JFrame?frame;??????String?simpleDialogDesc?=?"简单的信息提示对话窗";??
????String?iconDesc?=?"带有图标的对话窗";??????String?moreDialogDesc?=?"复杂信息对话窗";??
????CustomDialog?customDialog;??/**?
?*方法说明：构造器，生成一个面板添加到JFrame中??*输入参数：?
?*返回类型：??*/??
????public?DialogDemo(JFrame?frame)?{??????????super(new?BorderLayout());??
????????this.frame?=?frame;??????????customDialog?=?new?CustomDialog(frame,?"tom",?this);??
????????customDialog.pack();????
????????//创建成员??????????JPanel?frequentPanel?=?createSimpleDialogBox();??
????????JPanel?featurePanel?=?createFeatureDialogBox();??????????JPanel?iconPanel?=?createIconDialogBox();??
????????label?=?new?JLabel("点击"显示"?按钮"?????????????????????????????+?"?显示一个选择的对话框",??
???????????????????????????JLabel.CENTER);????
????????//放置对象??????????Border?padding?=?BorderFactory.createEmptyBorder(20,20,5,20);??
????????frequentPanel.setBorder(padding);??????????featurePanel.setBorder(padding);??
????????iconPanel.setBorder(padding);??????????//创建选项卡??
????????JTabbedPane?tabbedPane?=?new?JTabbedPane();??????????tabbedPane.addTab("简单对话窗",?null,??
??????????????????????????frequentPanel,????????????????????????????simpleDialogDesc);???
????????tabbedPane.addTab("复杂对话窗",?null,????????????????????????????featurePanel,??
??????????????????????????moreDialogDesc);??????????tabbedPane.addTab("图标对话窗",?null,??
??????????????????????????iconPanel,????????????????????????????iconDesc);??
??????????add(tabbedPane,?BorderLayout.CENTER);??
????????add(label,?BorderLayout.PAGE_END);??????????label.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));??
????}??/**?
?*方法说明：设置按钮上的文字??*输入参数：String?newText?添加的文字?
?*返回类型：??*/??
????void?setLabel(String?newText)?{??????????label.setText(newText);??
????}??/**?
?*方法说明：获取图片??*输入参数：String?path?图片完整路径和名字?
?*返回类型：ImageIcon?图片对象??*/??
????protected?static?ImageIcon?createImageIcon(String?path)?{??????????java.net.URL?imgURL?=?DialogDemo.class.getResource(path);??
????????if?(imgURL?!=?null)?{??????????????return?new?ImageIcon(imgURL);??
????????}?else?{??????????????System.err.println("Couldn't?find?file:?"?+?path);??
????????????return?null;??????????}??
????}??/**?
?*方法说明：创建一个JPanel，给第一个选项卡??*输入参数：?
?*返回类型：??*/??
????private?JPanel?createSimpleDialogBox()?{??????????final?int?numButtons?=?4;??
????????JRadioButton[]?radioButtons?=?new?JRadioButton[numButtons];??????????final?ButtonGroup?group?=?new?ButtonGroup();??
??????????JButton?showItButton?=?null;??
??????????final?String?defaultMessageCommand?=?"default";??
????????final?String?yesNoCommand?=?"yesno";??????????final?String?yeahNahCommand?=?"yeahnah";??
????????final?String?yncCommand?=?"ync";??????????//添加单选到数字??
????????radioButtons[0]?=?new?JRadioButton("只有“OK”按钮");??????????radioButtons[0].setActionCommand(defaultMessageCommand);??
??????????radioButtons[1]?=?new?JRadioButton("有“Yes/No”二个按钮");??
????????radioButtons[1].setActionCommand(yesNoCommand);????
????????radioButtons[2]?=?new?JRadioButton("有“Yes/No”两个按钮?"????????????????????????+?"(程序添加文字)");??
????????radioButtons[2].setActionCommand(yeahNahCommand);????
????????radioButtons[3]?=?new?JRadioButton("有“Yes/No/Cancel”三个按钮?"?????????????????????????????+?"(程序添加文字)");??
????????radioButtons[3].setActionCommand(yncCommand);??????????//将四个单选组成一个群??
????????for?(int?i?=?0;?i?<?numButtons;?i++)?{??????????????group.add(radioButtons[i]);??
????????}??????????//设置第一个为默认选择??
????????radioButtons[0].setSelected(true);??????????//定义“显示”按钮??
????????showItButton?=?new?JButton("显示");??????????//给“显示”按钮添加监听??
????????showItButton.addActionListener(new?ActionListener()?{??????????????public?void?actionPerformed(ActionEvent?e)?{??
????????????????String?command?=?group.getSelection().getActionCommand();????
????????????????//ok对话窗??????????????????if?(command?==?defaultMessageCommand)?{??
????????????????????JOptionPane.showMessageDialog(frame,??????????????????????????????????"鸡蛋不可能是绿色的！");??
??????????????????//yes/no?对话窗??
????????????????}?else?if?(command?==?yesNoCommand)?{??????????????????????int?n?=?JOptionPane.showConfirmDialog(??
????????????????????????????frame,?"你喜欢吃酸菜鱼吗?",??????????????????????????????"一个很无聊的问题！！",??
????????????????????????????JOptionPane.YES_NO_OPTION);??????????????????????if?(n?==?JOptionPane.YES_OPTION)?{//选择yes??
????????????????????????setLabel("哇！我也是！");??????????????????????}?else?if?(n?==?JOptionPane.NO_OPTION)?{//选择no??
????????????????????????setLabel("唉！我喜欢吃！");??????????????????????}?else?{??
????????????????????????setLabel("快告诉我吧！");??????????????????????}??
??????????????????//yes/no?(自己输入选项)??
????????????????}?else?if?(command?==?yeahNahCommand)?{??????????????????????Object[]?options?=?{"是的",?"不喜欢"};??
????????????????????int?n?=?JOptionPane.showOptionDialog(frame,??????????????????????????????????????"你喜欢酸菜鱼吗?",??
????????????????????????????????????"又一个无聊的问题！",??????????????????????????????????????JOptionPane.YES_NO_OPTION,??
????????????????????????????????????JOptionPane.QUESTION_MESSAGE,??????????????????????????????????????null,??
????????????????????????????????????options,??????????????????????????????????????options[0]);??
????????????????????if?(n?==?JOptionPane.YES_OPTION)?{??????????????????????????setLabel("你哄人的吧，我也喜欢。");??
????????????????????}?else?if?(n?==?JOptionPane.NO_OPTION)?{??????????????????????????setLabel("其实我也不喜欢！");??
????????????????????}?else?{??????????????????????????setLabel("这都不肯告诉我，小气鬼！");??
????????????????????}????
????????????????//yes/no/cancel?对话框??????????????????}?else?if?(command?==?yncCommand)?{??
????????????????????Object[]?options?=?{"是的，给我来一份。",??????????????????????????????????????????"不，谢谢！",??
????????????????????????????????????????"不，我要水煮鱼！"};??????????????????????//构造对话框??
????????????????????int?n?=?JOptionPane.showOptionDialog(frame,??????????????????????????????????????"先生！我们这里有鲜美的酸菜鱼，您需要吗？",??
????????????????????????????????????"服务生的问题。",??????????????????????????????????????JOptionPane.YES_NO_CANCEL_OPTION,??
????????????????????????????????????JOptionPane.QUESTION_MESSAGE,??????????????????????????????????????null,??
????????????????????????????????????options,??????????????????????????????????????options[2]);??
????????????????????if?(n?==?JOptionPane.YES_OPTION)?{??????????????????????????setLabel("你要的酸菜鱼来了！");??
????????????????????}?else?if?(n?==?JOptionPane.NO_OPTION)?{??????????????????????????setLabel("好的，你需要其它的。");??
????????????????????}?else?if?(n?==?JOptionPane.CANCEL_OPTION)?{??????????????????????????setLabel("好的，我们给你做水煮鱼！");??
????????????????????}?else?{??????????????????????????setLabel("对不起！你还没有点菜呢！");??
????????????????????}??????????????????}??
????????????????return;??????????????}??
????????});????
????????return?createPane(simpleDialogDesc?+?":",????????????????????????????radioButtons,??
??????????????????????????showItButton);??????}??
/**??*方法说明：提供给createSimpleDialogBox和createFeatureDialogBox方法?
?*方法说明：创建带提示信息、一列单选框和“显示”按钮??*输入参数：String?description?提示帮助信息?
?*输入参数：JRadioButton[]?radioButtons?单选框组??*输入参数：JButton?showButton?“显示”按钮?
?*返回类型：JPanel?添加好的面板??*/??
????private?JPanel?createPane(String?description,????????????????????????????????JRadioButton[]?radioButtons,??
??????????????????????????????JButton?showButton)?{????
????????int?numChoices?=?radioButtons.length;??????????JPanel?box?=?new?JPanel();??
????????JLabel?label?=?new?JLabel(description);????
????????box.setLayout(new?BoxLayout(box,?BoxLayout.PAGE_AXIS));??????????box.add(label);??
????????//添加radio??????????for?(int?i?=?0;?i?<?numChoices;?i++)?{??
????????????box.add(radioButtons[i]);??????????}??
??????????JPanel?pane?=?new?JPanel(new?BorderLayout());??
????????pane.add(box,?BorderLayout.PAGE_START);??????????pane.add(showButton,?BorderLayout.PAGE_END);??
????????return?pane;??????}??
/**??*方法说明：提供给createSimpleDialogBox和createFeatureDialogBox方法?
?*方法说明：创建带提示信息、二列单选框和“显示”按钮??*输入参数：String?description?提示帮助信息?
?*输入参数：JRadioButton[]?radioButtons?单选框组??*输入参数：JButton?showButton?“显示”按钮?
?*返回类型：JPanel?添加好的面板??*/??
?????private?JPanel?create2ColPane(String?description,????????????????????????????????????JRadioButton[]?radioButtons,??
??????????????????????????????????JButton?showButton)?{??????????JLabel?label?=?new?JLabel(description);??
????????int?numPerColumn?=?radioButtons.length/2;????
????????JPanel?grid?=?new?JPanel(new?GridLayout(0,?2));??????????for?(int?i?=?0;?i?<?numPerColumn;?i++)?{??
????????????grid.add(radioButtons[i]);??????????????grid.add(radioButtons[i?+?numPerColumn]);??
????????}????
????????JPanel?box?=?new?JPanel();??????????box.setLayout(new?BoxLayout(box,?BoxLayout.PAGE_AXIS));??
????????box.add(label);??????????grid.setAlignmentX(0.0f);??
????????box.add(grid);????
????????JPanel?pane?=?new?JPanel(new?BorderLayout());??????????pane.add(box,?BorderLayout.PAGE_START);??
????????pane.add(showButton,?BorderLayout.PAGE_END);????
????????return?pane;??????}??
/**??*方法说明：创建第三个选项卡的面板?
?*方法说明：这里都是实现showMessageDialog类，但是也可以指定图标??*输入参数：?
?*返回类型：JPanel?构造好的面板??*/??
??????private?JPanel?createIconDialogBox()?{??
????????JButton?showItButton?=?null;????
????????final?int?numButtons?=?6;??????????JRadioButton[]?radioButtons?=?new?JRadioButton[numButtons];??
????????final?ButtonGroup?group?=?new?ButtonGroup();????
????????final?String?plainCommand?=?"plain";??????????final?String?infoCommand?=?"info";??
????????final?String?questionCommand?=?"question";??????????final?String?errorCommand?=?"error";??
????????final?String?warningCommand?=?"warning";??????????final?String?customCommand?=?"custom";??
??????????radioButtons[0]?=?new?JRadioButton("普通（没有图标）");??
????????radioButtons[0].setActionCommand(plainCommand);????
????????radioButtons[1]?=?new?JRadioButton("信息图标");??????????radioButtons[1].setActionCommand(infoCommand);??
??????????radioButtons[2]?=?new?JRadioButton("问题图标");??
????????radioButtons[2].setActionCommand(questionCommand);????
????????radioButtons[3]?=?new?JRadioButton("错误图标");??????????radioButtons[3].setActionCommand(errorCommand);??
??????????radioButtons[4]?=?new?JRadioButton("警告图标");??
????????radioButtons[4].setActionCommand(warningCommand);????
????????radioButtons[5]?=?new?JRadioButton("自定义图标");??????????radioButtons[5].setActionCommand(customCommand);??
??????????for?(int?i?=?0;?i?<?numButtons;?i++)?{??
????????????group.add(radioButtons[i]);??????????}??
????????radioButtons[0].setSelected(true);????
????????showItButton?=?new?JButton("显示");??????????showItButton.addActionListener(new?ActionListener()?{??
????????????public?void?actionPerformed(ActionEvent?e)?{??????????????????String?command?=?group.getSelection().getActionCommand();??
??????????????????//没有图标??
????????????????if?(command?==?plainCommand)?{??????????????????????JOptionPane.showMessageDialog(frame,??
????????????????????????????????????"水煮鱼里不要放酸菜！",??????????????????????????????????????"无图标",??
????????????????????????????????????JOptionPane.PLAIN_MESSAGE);??????????????????//信息图标??
????????????????}?else?if?(command?==?infoCommand)?{??????????????????????JOptionPane.showMessageDialog(frame,??
????????????????????????????????????"水煮鱼里不要放酸菜！",??????????????????????????????????????"信息图标",??
????????????????????????????????????JOptionPane.INFORMATION_MESSAGE);????
????????????????//问题图标??????????????????}?else?if?(command?==?questionCommand)?{??
????????????????????JOptionPane.showMessageDialog(frame,??????????????????????????????????????"请你吃饭前洗手，好吗？",??
????????????????????????????????????"问题",??????????????????????????????????????JOptionPane.QUESTION_MESSAGE);??
????????????????//错误图标??????????????????}?else?if?(command?==?errorCommand)?{??
????????????????????JOptionPane.showMessageDialog(frame,??????????????????????????????????????"对不起，你的信用卡没有资金了！",??
????????????????????????????????????"错误信息",??????????????????????????????????????JOptionPane.ERROR_MESSAGE);??
????????????????//警告图标??????????????????}?else?if?(command?==?warningCommand)?{??
????????????????????JOptionPane.showMessageDialog(frame,??????????????????????????????????????"警告！你严重透支信用卡，请尽快补齐金额！",??
????????????????????????????????????"警告信息",??????????????????????????????????????JOptionPane.WARNING_MESSAGE);??
????????????????//自定义图标??????????????????}?else?if?(command?==?customCommand)?{??
????????????????????JOptionPane.showMessageDialog(frame,??????????????????????????????????????"哈哈。我想用什么图标都可以！",??
????????????????????????????????????"自定义对话窗",??????????????????????????????????????JOptionPane.INFORMATION_MESSAGE,??
????????????????????????????????????icon);??????????????????}??
????????????}??????????});??
??????????return?create2ColPane(iconDesc?+?":",??
??????????????????????????????radioButtons,????????????????????????????????showItButton);??
????}??/**?
?*方法说明：创建一个JPanel，放在第二个选项卡上??*输入参数：?
?*返回类型：??*/??
????private?JPanel?createFeatureDialogBox()?{??????????final?int?numButtons?=?5;??
????????JRadioButton[]?radioButtons?=?new?JRadioButton[numButtons];??????????final?ButtonGroup?group?=?new?ButtonGroup();??
??????????JButton?showItButton?=?null;??
????????//定义操作命令??????????final?String?pickOneCommand?=?"pickone";??
????????final?String?textEnteredCommand?=?"textfield";??????????final?String?nonAutoCommand?=?"nonautooption";??
????????final?String?customOptionCommand?=?"customoption";??????????final?String?nonModalCommand?=?"nonmodal";??
????????//定义radio数组??????????radioButtons[0]?=?new?JRadioButton("选择一个");??
????????radioButtons[0].setActionCommand(pickOneCommand);????
????????radioButtons[1]?=?new?JRadioButton("输入信息");??????????radioButtons[1].setActionCommand(textEnteredCommand);??
??????????radioButtons[2]?=?new?JRadioButton("关闭按钮无效");??
????????radioButtons[2].setActionCommand(nonAutoCommand);????
????????radioButtons[3]?=?new?JRadioButton("输入校验"?????????????????????????????????????????????+?"(用户输入信息)");??
????????radioButtons[3].setActionCommand(customOptionCommand);????
????????radioButtons[4]?=?new?JRadioButton("没有模式");??????????radioButtons[4].setActionCommand(nonModalCommand);??
????????//合成一个组群??????????for?(int?i?=?0;?i?<?numButtons;?i++)?{??
????????????group.add(radioButtons[i]);??????????}??
????????//设置第一个为默认选择??????????radioButtons[0].setSelected(true);??
??????????showItButton?=?new?JButton("显示");??
????????showItButton.addActionListener(new?ActionListener()?{??????????????@SuppressWarnings("static-access")??
????????????public?void?actionPerformed(ActionEvent?e)?{??????????????????String?command?=?group.getSelection().getActionCommand();??
??????????????????//选择一个??
????????????????if?(command?==?pickOneCommand)?{??????????????????????Object[]?possibilities?=?{"辣椒",?"西红柿",?"洋葱"};??
????????????????????//设置对话框??????????????????????String?s?=?(String)JOptionPane.showInputDialog(??
????????????????????????????????????????frame,????//所属窗体??????????????????????????????????????????"请选择项目：\n"??
????????????????????????????????????????+?""鸡蛋炒"",??//输出信息??????????????????????????????????????????"客户选择",??
????????????????????????????????????????JOptionPane.PLAIN_MESSAGE,??//对话框模式??????????????????????????????????????????icon,???????????//显示图标??
????????????????????????????????????????possibilities,???//选项内容??????????????????????????????????????????"辣椒");????//默认选项??
??????????????????????//如果有选择??
????????????????????if?((s?!=?null)?&&?(s.length()?>?0))?{??????????????????????????setLabel("鸡蛋炒"?+?s?+?"!");??
????????????????????????return;??????????????????????}??
??????????????????????//如果客户没有选择??
????????????????????setLabel("快点！");????
????????????????//文本输入??????????????????}?else?if?(command?==?textEnteredCommand)?{??
????????????????????String?s?=?(String)JOptionPane.showInputDialog(??????????????????????????????????????????frame,??
????????????????????????????????????????"选择一个配料\n"??????????????????????????????????????????+?""鸡蛋炒"",??
????????????????????????????????????????"客户输入",??????????????????????????????????????????JOptionPane.PLAIN_MESSAGE,??
????????????????????????????????????????icon,??????????????????????????????????????????null,??
????????????????????????????????????????"辣椒");????
????????????????????//如果用户有输入??????????????????????if?((s?!=?null)?&&?(s.length()?>?0))?{??
????????????????????????setLabel("你要的是鸡蛋炒"?+?s?+?"！");??????????????????????????return;??
????????????????????}????
????????????????????//如果返回的是空或者是null。??????????????????????setLabel("快些选择！");??
??????????????????//关闭按钮无效??
????????????????}?else?if?(command?==?nonAutoCommand)?{??????????????????????//构造一个对话框面板??
????????????????????final?JOptionPane?optionPane?=?new?JOptionPane(??????????????????????????????????????"关闭这个对话框\n"??
????????????????????????????????????+?"请点击下面的按钮\n"??????????????????????????????????????+?"明白吗？",??
????????????????????????????????????JOptionPane.QUESTION_MESSAGE,??????????????????????????????????????JOptionPane.YES_NO_OPTION);??
??????????????????????JDialog.setDefaultLookAndFeelDecorated(false);??
????????????????????//构造一个对话框??????????????????????final?JDialog?dialog?=?new?JDialog(frame,??
?????????????????????????????????????????????????"点击一个按钮",???????????????????????????????????????????????????true);??
????????????????????//将对话框面板添加到对话框中??????????????????????dialog.setContentPane(optionPane);??
????????????????????//设置对话框关闭时的操作模式??????????????????????dialog.setDefaultCloseOperation(??
????????????????????????JDialog.DO_NOTHING_ON_CLOSE);??????????????????????dialog.addWindowListener(new?WindowAdapter()?{??
????????????????????????public?void?windowClosing(WindowEvent?we)?{?//当点击关闭按钮??????????????????????????????setLabel("阻碍用户视图关闭窗体！");??
????????????????????????}??????????????????????});??
??????????????????????????????????????????JDialog.setDefaultLookAndFeelDecorated(true);??
??????????????????????????????????????????optionPane.addPropertyChangeListener(??
????????????????????????new?PropertyChangeListener()?{??????????????????????????????public?void?propertyChange(PropertyChangeEvent?e)?{??
????????????????????????????????String?prop?=?e.getPropertyName();????
????????????????????????????????if?(dialog.isVisible()???????????????????????????????????&&?(e.getSource()?==?optionPane)??
?????????????????????????????????&&?(JOptionPane.VALUE_PROPERTY.equals(prop)))?{??????????????????????????????????????//如果你要阻止关闭按钮，可以在这里进行处理。??
??????????????????????????????????????????????????????????????????????????dialog.setVisible(false);??
????????????????????????????????}??????????????????????????????}??
????????????????????????});??????????????????????dialog.pack();??
????????????????????dialog.setLocationRelativeTo(frame);??????????????????????dialog.setVisible(true);??
??????????????????????????????????????????int?value?=?((Integer)optionPane.getValue()).intValue();??
????????????????????if?(value?==?JOptionPane.YES_OPTION)?{??????????????????????????setLabel("好的");??
????????????????????}?else?if?(value?==?JOptionPane.NO_OPTION)?{??????????????????????????setLabel("试图点击关闭按钮来关闭一个不能关闭的对话框！"??
?????????????????????????????????+?"你不能！");??????????????????????}?else?{??
????????????????????????setLabel("窗体可以使用ESC键关闭。");??????????????????????}??
???????????????????//自己定义版面??
????????????????}?else?if?(command?==?customOptionCommand)?{??????????????????????customDialog.setLocationRelativeTo(frame);??
????????????????????customDialog.setVisible(true);????
????????????????????String?s?=?customDialog.getValidatedText();??????????????????????if?(s?!=?null)?{??
????????????????????????//The?text?is?valid.??????????????????????????setLabel("欢迎你！"??
?????????????????????????????????+?"你已经进入了""???????????????????????????????????+?s??
?????????????????????????????????+?""。");??????????????????????}??
??????????????????//没有模式??
????????????????}?else?if?(command?==?nonModalCommand)?{??????????????????????//创建一个对话框??
????????????????????final?JDialog?dialog?=?new?JDialog(frame,?????????????????????????????????????????????????????????"一个没有模式的对话框");??
????????????????????//使用html语言来显示信息??????????????????????JLabel?label?=?new?JLabel("<html><p?align=center>"??
????????????????????????+?"这是一个没有模式的对话框"??????????????????????????+?"你可以使用更多的格式"??
????????????????????????+?"甚至可以使用主窗体！");??????????????????????label.setHorizontalAlignment(JLabel.CENTER);??
????????????????????Font?font?=?label.getFont();????????????????????????
????????????????????label.setFont(label.getFont().deriveFont(font.PLAIN,???????????????????????????????????????????????????????????????14.0f));??
??????????????????????JButton?closeButton?=?new?JButton("关闭");??
????????????????????closeButton.addActionListener(new?ActionListener()?{??????????????????????????public?void?actionPerformed(ActionEvent?e)?{??
????????????????????????????dialog.setVisible(false);??????????????????????????????dialog.dispose();??
????????????????????????}??????????????????????});??
????????????????????JPanel?closePanel?=?new?JPanel();??????????????????????closePanel.setLayout(new?BoxLayout(closePanel,??
???????????????????????????????????????????????????????BoxLayout.LINE_AXIS));??????????????????????closePanel.add(Box.createHorizontalGlue());??
????????????????????closePanel.add(closeButton);??????????????????????closePanel.setBorder(BorderFactory.??
????????????????????????createEmptyBorder(0,0,5,5));????
????????????????????JPanel?contentPane?=?new?JPanel(new?BorderLayout());??????????????????????contentPane.add(label,?BorderLayout.CENTER);??
????????????????????contentPane.add(closePanel,?BorderLayout.PAGE_END);??????????????????????contentPane.setOpaque(true);??
????????????????????dialog.setContentPane(contentPane);????
????????????????????//显示窗体??????????????????????dialog.setSize(new?Dimension(300,?150));??
????????????????????dialog.setLocationRelativeTo(frame);??????????????????????dialog.setVisible(true);??
????????????????}??????????????}??
????????});????
????????return?createPane(moreDialogDesc?+?":",????????????????????????????radioButtons,??
??????????????????????????showItButton);??????}??
??????public?static?void?main(String[]?args)?{??
??????????JFrame.setDefaultLookAndFeelDecorated(true);??
????????JDialog.setDefaultLookAndFeelDecorated(true);????
????????//创建和设置一个窗体??????????JFrame?frame?=?new?JFrame("DialogDemo");??
????????frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);????
????????//设置一个面板??????????Container?contentPane?=?frame.getContentPane();??
????????contentPane.setLayout(new?GridLayout(1,1));??????????contentPane.add(new?DialogDemo(frame));??
??????????//显示窗体??
????????frame.pack();??????????frame.setVisible(true);??
????}??}??

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package?test17;????
import?java.io.*;??import?java.awt.*;??
import?java.awt.event.*;??import?javax.swing.*;??
/**??*?Title:?文件对话框演示?
?*?Description:?演示打开文件对话框和保存文件对话框，使用了文件过滤。??*?Filename:?FileChooserDemo.java?
?*/????
public?class?FileChooserDemo?extends?JPanel???????????????????????????????implements?ActionListener?{??
??????private?static?final?long?serialVersionUID?=?1L;??
????static?private?final?String?newline?=?"\n";??????JButton?openButton,?saveButton;??
????JTextArea?log;??????JFileChooser?fc;??
??????public?FileChooserDemo()?{??
????????super(new?BorderLayout());????
????????log?=?new?JTextArea(15,40);??????????log.setMargin(new?Insets(10,10,10,10));??
????????log.setEditable(false);??????????JScrollPane?logScrollPane?=?new?JScrollPane(log);??
??????????//创建一个文件过滤，使用当前目录??
????????fc?=?new?JFileChooser(".");??????????//过滤条件在MyFilter类中定义??
????????fc.addChoosableFileFilter(new?MyFilter());????
????????openButton?=?new?JButton("打开文件",???????????????????????????????????createImageIcon("images/Open16.gif"));??
????????openButton.addActionListener(this);????
????????saveButton?=?new?JButton("保存文件",???????????????????????????????????createImageIcon("images/Save16.gif"));??
????????saveButton.addActionListener(this);????
????????//构建一个面板，添加“打开文件”和“保存文件”??????????JPanel?buttonPanel?=?new?JPanel();???
????????buttonPanel.add(openButton);??????????buttonPanel.add(saveButton);??
??????????add(buttonPanel,?BorderLayout.PAGE_START);??
????????add(logScrollPane,?BorderLayout.CENTER);??????}??
/**??*方法说明：事件处理?
?*输入参数：??*返回类型：?
?*/??????public?void?actionPerformed(ActionEvent?e)?{??
??????????//当点击“打开文件”按钮??
????????if?(e.getSource()?==?openButton)?{??????????????int?returnVal?=?fc.showOpenDialog(FileChooserDemo.this);??
??????????????if?(returnVal?==?JFileChooser.APPROVE_OPTION)?{??
????????????????File?file?=?fc.getSelectedFile();??????????????????//在这里添加一些对文件的处理??
????????????????log.append("打开文件:?"?+?file.getName()?+?newline);??????????????}?else?{??
????????????????log.append("打开文件被用户取消！"?+?newline);??????????????}??
??????????//点击“保存文件”按钮??
????????}?else?if?(e.getSource()?==?saveButton)?{??????????????int?returnVal?=?fc.showSaveDialog(FileChooserDemo.this);??
????????????if?(returnVal?==?JFileChooser.APPROVE_OPTION)?{??????????????????File?file?=?fc.getSelectedFile();??
????????????????//在这里添加一些对文件的处理??????????????????log.append("保存文件:?"?+?file.getName()??+?newline);??
????????????}?else?{??????????????????log.append("保存文件被用户取消！"?+?newline);??
????????????}??????????}??
????}??/**?
?*方法说明：获取图像对象??*输入参数：String?path?图片路径?
?*返回类型：ImageIcon?图片对象??*/??
????protected?static?ImageIcon?createImageIcon(String?path)?{??????????java.net.URL?imgURL?=?FileChooserDemo.class.getResource(path);??
????????if?(imgURL?!=?null)?{??????????????return?new?ImageIcon(imgURL);??
????????}?else?{??????????????System.err.println("Couldn't?find?file:?"?+?path);??
????????????return?null;??????????}??
????}????
????public?static?void?main(String[]?args)?{??????????JFrame.setDefaultLookAndFeelDecorated(true);??
????????JDialog.setDefaultLookAndFeelDecorated(true);????
????????//创建窗体??????????JFrame?frame?=?new?JFrame("FileChooserDemo");??
????????frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);????
????????//创建一个面板??????????JComponent?newContentPane?=?new?FileChooserDemo();??
????????newContentPane.setOpaque(true);??????????frame.setContentPane(newContentPane);??
??????????//显示窗体??
????????frame.pack();??????????frame.setVisible(true);??
????}??}??

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package?test17;????
import?java.io.File;??import?javax.swing.filechooser.*;??
/**??*?Title:?文件过滤器演示?
?*?Description:?FileChooserDemo文件使用的文件过滤器??*?Filename:?MyFilter.java?
?*/????
public?class?MyFilter?extends?FileFilter?{?????@SuppressWarnings("unused")??
private?String?files;?????public?boolean?accept(File?f)?{??
????????if?(f.isDirectory())?{??????????????return?true;??
????????}????
????????String?extension?=?getExtension(f);??????????if?(extension?!=?null)?{??
??????????????????????????if?(extension.equals("java"))?{//定义过滤Java文件??
????????????????????return?true;??????????????}?else?{??
????????????????return?false;??????????????}??
??????????}??
??????????return?false;??
????}????
????//过滤器描述??????public?String?getDescription()?{??
????????return?"Java";??????}??
/**??*方法说明：获取文件扩展名?
?*/??????public?static?String?getExtension(File?f)?{??
????????String?ext?=?null;??????????String?s?=?f.getName();??
????????int?i?=?s.lastIndexOf('.');????
????????if?(i?>?0?&&??i?<?s.length()?-?1)?{??????????????ext?=?s.substring(i+1).toLowerCase();??
????????}??????????return?ext;??
????}??}??

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package?test18;????
import?javax.swing.*;??import?java.awt.*;??
import?java.awt.event.*;??/**?
?*?Description:?这里演示使用html语言在swing面板上构造显示信息??*?Filename:?HtmlDemo.java?
?*/????
public?class?HtmlDemo?extends?JPanel????????????????????????implements?ActionListener?{??
??????private?static?final?long?serialVersionUID?=?1L;??
????JLabel?theLabel;??????JTextArea?htmlTextArea;??
/**??*方法说明：构造器，描述窗体中的成员?
?*输入参数：??*返回类型：?
?*/??????public?HtmlDemo()?{??
????????setLayout(new?BoxLayout(this,?BoxLayout.LINE_AXIS));????
????????String?initialText?=?"<html>\n"?+??????????????????"颜色和字体测试:\n"?+??
????????????????"<ul>\n"?+??????????????????"<li><font?color=red>red\n"?+??
????????????????"<li><font?color=blue>blue\n"?+??????????????????"<li><font?color=green>green\n"?+??
????????????????"<li><font?size=-2>small\n"?+??????????????????"<li><font?size=+2>large\n"?+??
????????????????"<li>italic\n"?+??????????????????"<li>bold\n"?+??
????????????????"</ul>\n";??????????//定义一个文本框??
????????htmlTextArea?=?new?JTextArea(10,?20);??????????htmlTextArea.setText(initialText);??
????????JScrollPane?scrollPane?=?new?JScrollPane(htmlTextArea);??????????//定义按钮??
????????JButton?changeTheLabel?=?new?JButton("改变显示");??????????changeTheLabel.setMnemonic(KeyEvent.VK_C);??
????????changeTheLabel.setAlignmentX(Component.CENTER_ALIGNMENT);??????????changeTheLabel.addActionListener(this);??
????????//定义标签??????????theLabel?=?new?JLabel(initialText)?{??
???????????????????????private?static?final?long?serialVersionUID?=?1L;??
????????????public?Dimension?getPreferredSize()?{??????????????????return?new?Dimension(200,?200);??
????????????}??????????????public?Dimension?getMinimumSize()?{??
????????????????return?new?Dimension(200,?200);??????????????}??
????????????public?Dimension?getMaximumSize()?{??????????????????return?new?Dimension(200,?200);??
????????????}??????????};??
????????//设置标签的对齐方式??????????theLabel.setVerticalAlignment(SwingConstants.CENTER);??
????????theLabel.setHorizontalAlignment(SwingConstants.CENTER);??????????//构造一个带边框的左边的编辑面板??
????????JPanel?leftPanel?=?new?JPanel();??????????leftPanel.setLayout(new?BoxLayout(leftPanel,?BoxLayout.PAGE_AXIS));??
????????leftPanel.setBorder(BorderFactory.createCompoundBorder(??????????????????BorderFactory.createTitledBorder(??
????????????????????"编辑HTML，点击按钮显示结果。"),??????????????????BorderFactory.createEmptyBorder(10,10,10,10)));??
????????leftPanel.add(scrollPane);??????????leftPanel.add(Box.createRigidArea(new?Dimension(0,10)));??
????????leftPanel.add(changeTheLabel);???????????//构造一个带边框的右边显示的面板??
????????JPanel?rightPanel?=?new?JPanel();??????????rightPanel.setLayout(new?BoxLayout(rightPanel,?BoxLayout.PAGE_AXIS));??
????????rightPanel.setBorder(BorderFactory.createCompoundBorder(??????????????????????????BorderFactory.createTitledBorder("这里使用标签显示HTML结果"),??
????????????????????????BorderFactory.createEmptyBorder(10,10,10,10)));??????????rightPanel.add(theLabel);??
??????????????????setBorder(BorderFactory.createEmptyBorder(10,10,10,10));??
????????add(leftPanel);??????????add(Box.createRigidArea(new?Dimension(10,0)));??
????????add(rightPanel);??????}??
/**??*方法说明：事件监听，当用户点击按钮触发?
?*输入参数：??*返回类型：?
?*/??????public?void?actionPerformed(ActionEvent?e)?{??
????????theLabel.setText(htmlTextArea.getText());??????}??
/**??*方法说明：主方法?
?*输入参数：??*返回类型：?
?*/??????public?static?void?main(String[]?args)?{??
??????????JFrame.setDefaultLookAndFeelDecorated(true);??
??????????//创建窗体??
????????JFrame?frame?=?new?JFrame("HtmlDemo");??????????frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);??
??????????//创建面板??
????????JComponent?newContentPane?=?new?HtmlDemo();??????????newContentPane.setOpaque(true);??
????????frame.setContentPane(newContentPane);????
????????//显示窗体??????????frame.pack();??
????????frame.setVisible(true);??????}??
}??

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package?test19;????
import?java.awt.*;??import?java.awt.event.*;??
import?javax.swing.JPopupMenu;??import?javax.swing.JMenu;??
import?javax.swing.JMenuItem;??import?javax.swing.JCheckBoxMenuItem;??
import?javax.swing.JRadioButtonMenuItem;??import?javax.swing.ButtonGroup;??
import?javax.swing.JMenuBar;??import?javax.swing.KeyStroke;??
import?javax.swing.ImageIcon;????
import?javax.swing.JPanel;??import?javax.swing.JTextArea;??
import?javax.swing.JScrollPane;??import?javax.swing.JFrame;??
/**??*?Title:?菜单演示?
?*?Description:?演示菜单的建立和快捷键的使用。??*?Filename:?MenuDemo.java?
?*/????
public?class?MenuDemo?implements?ActionListener,?ItemListener?{??????JTextArea?output;??
????JScrollPane?scrollPane;??????String?newline?=?"\n";??
/**??*方法说明：组建菜单栏?
?*输入参数：??*返回类型：?
?*/??????public?JMenuBar?createMenuBar()?{??
????????JMenuBar?menuBar;??????????JMenu?menu,?submenu;??
????????JMenuItem?menuItem;??????????JRadioButtonMenuItem?rbMenuItem;??
????????JCheckBoxMenuItem?cbMenuItem;????
????????//定义菜单条??????????menuBar?=?new?JMenuBar();??
??????????//定义第一个菜单??
????????menu?=?new?JMenu("(A)菜单");??????????menu.setMnemonic(KeyEvent.VK_A);??
????????menuBar.add(menu);????
????????//下面开始定义菜单项????????????
????????//只有文字??????????menuItem?=?new?JMenuItem("(O)只有文本的菜单",??
?????????????????????????????????KeyEvent.VK_O);??????????//设置快捷键??
????????menuItem.setAccelerator(KeyStroke.getKeyStroke(??????????????????KeyEvent.VK_1,?ActionEvent.ALT_MASK));??
????????//添加监听??????????menuItem.addActionListener(this);??
????????menu.add(menuItem);??????????//有图标还有文字??
????????ImageIcon?icon?=?createImageIcon("images/middle.gif");??????????menuItem?=?new?JMenuItem("(B)有图标和文字的菜单",?icon);??
????????menuItem.setMnemonic(KeyEvent.VK_B);??????????menuItem.addActionListener(this);??
????????menu.add(menuItem);??????????//只有图标??
????????menuItem?=?new?JMenuItem(icon);??????????menuItem.setMnemonic(KeyEvent.VK_D);??
????????menuItem.addActionListener(this);??????????menu.add(menuItem);??
??????????//定义一组radio?button（单选按钮）菜单??
????????menu.addSeparator();??????????ButtonGroup?group?=?new?ButtonGroup();??
??????????rbMenuItem?=?new?JRadioButtonMenuItem("(R)使用radio的菜单");??
????????rbMenuItem.setSelected(true);??????????rbMenuItem.setMnemonic(KeyEvent.VK_R);??
????????group.add(rbMenuItem);??????????rbMenuItem.addActionListener(this);??
????????menu.add(rbMenuItem);????
????????rbMenuItem?=?new?JRadioButtonMenuItem("(d)另外一个radio菜单");??????????rbMenuItem.setMnemonic(KeyEvent.VK_D);??
????????group.add(rbMenuItem);??????????rbMenuItem.addActionListener(this);??
????????menu.add(rbMenuItem);????
????????//定义一组check?box（检查盒）菜单??????????menu.addSeparator();??
????????cbMenuItem?=?new?JCheckBoxMenuItem("(C)使用检查盒的菜单");??????????cbMenuItem.setMnemonic(KeyEvent.VK_C);??
????????cbMenuItem.addItemListener(this);??????????menu.add(cbMenuItem);??
??????????cbMenuItem?=?new?JCheckBoxMenuItem("(H)另外一个检查盒");??
????????cbMenuItem.setMnemonic(KeyEvent.VK_H);??????????cbMenuItem.addItemListener(this);??
????????menu.add(cbMenuItem);????
????????//定义一个带子菜单??????????menu.addSeparator();??
????????submenu?=?new?JMenu("(S)带有子菜单");??????????submenu.setMnemonic(KeyEvent.VK_S);??
????????//定义子菜单??????????menuItem?=?new?JMenuItem("这是子菜单");??
????????//定义快捷键??????????menuItem.setAccelerator(KeyStroke.getKeyStroke(??
????????????????KeyEvent.VK_2,?ActionEvent.ALT_MASK));??????????menuItem.addActionListener(this);??
????????submenu.add(menuItem);????
????????menuItem?=?new?JMenuItem("子菜单项");??????????menuItem.addActionListener(this);??
????????submenu.add(menuItem);??????????menu.add(submenu);??
??????????//定义第二个菜单??
????????menu?=?new?JMenu("(N)第二个菜单");??????????menu.setMnemonic(KeyEvent.VK_N);??
????????menuBar.add(menu);????
????????return?menuBar;??????}??
/**??*方法说明：构建面板?
?*输入参数：??*返回类型：?
?*/??????public?Container?createContentPane()?{??
????????//构造一个面板??????????JPanel?contentPane?=?new?JPanel(new?BorderLayout());??
????????contentPane.setOpaque(true);????
????????//定义一个文本域??????????output?=?new?JTextArea(5,?30);??
????????output.setEditable(false);??????????scrollPane?=?new?JScrollPane(output);??
??????????//将文本域添加到面板中??
????????contentPane.add(scrollPane,?BorderLayout.CENTER);????
????????return?contentPane;??????}??
/**??*方法说明：构建弹出菜单?
?*输入参数：??*返回类型：?
?*/??????public?void?createPopupMenu()?{??
????????JMenuItem?menuItem;????
????????//构件弹出菜单??????????JPopupMenu?popup?=?new?JPopupMenu();??
????????ImageIcon?openicon?=?createImageIcon("images/Open16.gif");??????????menuItem?=?new?JMenuItem("打开文件",openicon);??
????????menuItem.addActionListener(this);??????????popup.add(menuItem);??
????????ImageIcon?saveicon?=?createImageIcon("images/Save16.gif");??????????menuItem?=?new?JMenuItem("保存文件",saveicon);??
????????menuItem.addActionListener(this);??????????popup.add(menuItem);??
??????????//添加一个监听给文本域，以便点击右键时响应??
????????MouseListener?popupListener?=?new?PopupListener(popup);??????????output.addMouseListener(popupListener);??
????}??/**?
?*方法说明：监听普通的菜单选择??*输入参数：ActionEvent?e?事件?
?*返回类型：??*/??
????public?void?actionPerformed(ActionEvent?e)?{??????????JMenuItem?source?=?(JMenuItem)(e.getSource());??
????????String?s?=?"监测事件。"?????????????????????+?newline??
???????????????????+?"????事件源:?"?+?source.getText()?????????????????????+?"?(选择对象"?+?getClassName(source)?+?")";??
????????output.append(s?+?newline);??????}??
/**??*方法说明：监听检查盒菜单选择项?
?*输入参数：ItemEvent?e?检查盒触发的事件??*返回类型：?
?*/??????public?void?itemStateChanged(ItemEvent?e)?{??
????????JMenuItem?source?=?(JMenuItem)(e.getSource());??????????String?s?=?"菜单项监听"??
???????????????????+?newline?????????????????????+?"????事件源:?"?+?source.getText()??
???????????????????+?"?(选择对象?"?+?getClassName(source)?+?")"?????????????????????+?newline??
???????????????????+?"????新的状态:?"?????????????????????+?((e.getStateChange()?==?ItemEvent.SELECTED)????
?????????????????????"选择":"不选择");??????????output.append(s?+?newline);??
????}??/**?
?*方法说明：获得类的名字??*输入参数：?
?*返回类型：??*/??
????protected?String?getClassName(Object?o)?{??????????String?classString?=?o.getClass().getName();??
????????int?dotIndex?=?classString.lastIndexOf(".");??????????return?classString.substring(dotIndex+1);??
????}??/**?
?*方法说明：根据路径查找图片??*输入参数：String?path?图片的路径?
?*返回类型：ImageIcon?图片对象??*/??
????protected?static?ImageIcon?createImageIcon(String?path)?{??????????java.net.URL?imgURL?=?MenuDemo.class.getResource(path);??
????????if?(imgURL?!=?null)?{??????????????return?new?ImageIcon(imgURL);??
????????}?else?{??????????????System.err.println("Couldn't?find?file:?"?+?path);??
????????????return?null;??????????}??
????}????
????public?static?void?main(String[]?args)?{??????????JFrame.setDefaultLookAndFeelDecorated(true);??
??????????//创建一个窗体??
????????JFrame?frame?=?new?JFrame("MenuDemo");??????????frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);??
??????????//创建菜单，并添加到面板中??
????????MenuDemo?demo?=?new?MenuDemo();??????????frame.setJMenuBar(demo.createMenuBar());??
????????frame.setContentPane(demo.createContentPane());????
????????//生成弹出菜单??????????demo.createPopupMenu();??
??????????//显示窗体??
????????frame.setSize(450,?260);??????????frame.setVisible(true);??
????}??//弹出菜单监听类??
????class?PopupListener?extends?MouseAdapter?{??????????JPopupMenu?popup;??
??????????PopupListener(JPopupMenu?popupMenu)?{??
????????????popup?=?popupMenu;??????????}??
??????????????????public?void?mousePressed(MouseEvent?e)?{??
????????????maybeShowPopup(e);??????????}??
??????????public?void?mouseReleased(MouseEvent?e)?{??
????????????maybeShowPopup(e);??????????}??
??????????private?void?maybeShowPopup(MouseEvent?e)?{??
????????????if?(e.isPopupTrigger())?{??????????????????popup.show(e.getComponent(),??
???????????????????????????e.getX(),?e.getY());??????????????}??
????????}??????}??
}??

view plain

package?test20;????
import?javax.swing.JToolBar;??import?javax.swing.JButton;??
import?javax.swing.ImageIcon;????
import?javax.swing.JFrame;??import?javax.swing.JTextArea;??
import?javax.swing.JScrollPane;??import?javax.swing.JPanel;??
??import?java.net.URL;??
??import?java.awt.*;??
import?java.awt.event.*;??/**?
?*?Title:?工具栏演示??*?Description:?提供一个工具栏，包括“打开”、“保存”、“搜索”工具按钮?
?*?Filename:?ToolBarDemo.java??*/??
public?class?ToolBarDemo?extends?JPanel???????????????????????????implements?ActionListener?{??
??????private?static?final?long?serialVersionUID?=?1L;??
????protected?JTextArea?textArea;??????protected?String?newline?=?"\n";??
????static?final?private?String?OPEN?=?"OPEN";??????static?final?private?String?SAVE?=?"SAVE";??
????static?final?private?String?SEARCH?=?"SEARCH";??/**?
?*方法说明：构造器??*输入参数：?
?*返回类型：??*/??
????public?ToolBarDemo()?{??????????super(new?BorderLayout());??
??????????//创建工具栏??
????????JToolBar?toolBar?=?new?JToolBar();??????????addButtons(toolBar);??
??????????//创建一个文本域，用来输出一些信息??
????????textArea?=?new?JTextArea(15,?30);??????????textArea.setEditable(false);??
????????JScrollPane?scrollPane?=?new?JScrollPane(textArea);????
????????//安放成员??????????setPreferredSize(new?Dimension(450,?110));??
????????add(toolBar,?BorderLayout.PAGE_START);??????????add(scrollPane,?BorderLayout.CENTER);??
????}??/**?
?*方法说明：构建工具栏??*输入参数：JToolBar?toolBar?工具条?
?*返回类型：??*/??
????protected?void?addButtons(JToolBar?toolBar)?{??????????JButton?button?=?null;??
??????????//第一个按钮，“打开”??
????????button?=?makeNavigationButton("Open16",?OPEN,????????????????????????????????????????"打开一个文件！",??
??????????????????????????????????????"打开");??????????toolBar.add(button);??
??????????//第二个按钮，“保存”??
????????button?=?makeNavigationButton("Save16",?SAVE,????????????????????????????????????????"保存当前文件！",??
??????????????????????????????????????"保存");??????????toolBar.add(button);??
??????????//第三个按钮，“搜索”??
????????button?=?makeNavigationButton("Search16",?SEARCH,????????????????????????????????????????"搜索文件中的字符！",??
??????????????????????????????????????"搜索");??????????toolBar.add(button);??
????}??/**?
?*方法说明：构造工具栏上的按钮??*输入参数：?
?*返回类型：??*/??
????protected?JButton?makeNavigationButton(String?imageName,?????????????????????????????????????????????String?actionCommand,??
???????????????????????????????????????????String?toolTipText,?????????????????????????????????????????????String?altText)?{??
????????//搜索图片??????????String?imgLocation?=?"images/"??
?????????????????????????????+?imageName???????????????????????????????+?".gif";??
????????URL?imageURL?=?ToolBarDemo.class.getResource(imgLocation);????
????????//初始化工具按钮??????????JButton?button?=?new?JButton();??
????????//设置按钮的命令??????????button.setActionCommand(actionCommand);??
????????//设置提示信息??????????button.setToolTipText(toolTipText);??
????????button.addActionListener(this);????????????
????????if?(imageURL?!=?null)?{??????????????????????//找到图像??????????????button.setIcon(new?ImageIcon(imageURL));??
????????}?else?{?????????????????????????????????????//没有图像??????????????button.setText(altText);??
????????????System.err.println("Resource?not?found:?"?????????????????????????????????+?imgLocation);??
????????}????
????????return?button;??????}??
/**??*方法说明：事件监听?
?*输入参数：??*返回类型：?
?*/??????public?void?actionPerformed(ActionEvent?e)?{??
????????String?cmd?=?e.getActionCommand();??????????String?description?=?null;??
??????????if?(OPEN.equals(cmd))?{?//点击第一个按钮??
????????????description?=?"打开一个文件操作！";??????????}?else?if?(SAVE.equals(cmd))?{?//点击第二个按钮??
????????????description?=?"保存文件操作";??????????}?else?if?(SEARCH.equals(cmd))?{?//点击第三个按钮??
????????????description?=?"搜索字符操作";??????????}??
??????????displayResult("如果这里是真正的程序，你将进入：?"??
????????????????????????+?description);??????}??
??????protected?void?displayResult(String?actionDescription)?{??
????????textArea.append(actionDescription?+?newline);??????}??
??????public?static?void?main(String[]?args)?{??
????????JFrame.setDefaultLookAndFeelDecorated(true);????
????????//定义窗体??????????JFrame?frame?=?new?JFrame("ToolBarDemo");??
????????frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);????
????????//定义面板??????????ToolBarDemo?newContentPane?=?new?ToolBarDemo();??
????????newContentPane.setOpaque(true);??????????frame.setContentPane(newContentPane);??
??????????//显示窗体??
????????frame.pack();??????????frame.setVisible(true);??
????}??}?

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100个Java经典例证