练手java GUI(四)
GUI菜单：
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package gui.test07;import java.awt.CheckboxMenuItem;import java.awt.Frame;import java.awt.Menu;import java.awt.MenuBar;import java.awt.MenuItem;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class TestMenuBar extends Frame {MenuBar menuBar = new MenuBar();Menu fileM = new Menu("File");Menu editM = new Menu("Edit");Menu toolsM = new Menu("Tools");Menu helpM = new Menu("Help");MenuItem fileM1 = new MenuItem("New");MenuItem fileM2 = new MenuItem("Open");MenuItem fileM3 = new MenuItem("Save");Menu fileM4 = new Menu("print");MenuItem printM1 = new MenuItem("preview");MenuItem printM2 = new MenuItem("setting");CheckboxMenuItem fileM5 = new CheckboxMenuItem("Quit",true);public TestMenuBar() {menuBar.add(fileM);menuBar.add(editM);menuBar.add(toolsM);menuBar.add(helpM);fileM.add(fileM1);fileM.add(fileM2);fileM.add(fileM3);fileM.add(fileM4);fileM.addSeparator();fileM.add(fileM5);fileM4.add(printM1);//设置actionCommand，若不设置，默认为菜单上的label文本printM1.setActionCommand("junlas");fileM4.add(printM2);ActionListener ml = new MenuListener();//菜单点击，抛出ActionEventprintM1.addActionListener(ml);printM2.addActionListener(ml);this.setMenuBar(menuBar);addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {dispose();System.exit(0);}});}public static void main(String[] args) {TestMenuBar mainFrame = new TestMenuBar();mainFrame.setSize(400, 400);mainFrame.setTitle("TestMenuBar");mainFrame.setVisible(true);}}?
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package gui.test07;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class MenuListener implements ActionListener {@Overridepublic void actionPerformed(ActionEvent e) {if (e.getActionCommand().equals("junlas")) {System.out.println("doing junlas");}else if(e.getActionCommand().equals("setting")){System.out.println("doing setting");}}}??
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