用java写了一个记事本的字体对话框，可是当改变字体类型（style）时总不改变，不知道是哪里的问题，大家帮忙看看
import java.awt.*;import java.awt.event.*;import javax.swing.*;class FontWin extends Frame implements ItemListener,ActionListener{ Label lfont=new Label("字体:"), lglyph=new Label("字形:"), lsize=new Label("大小:"), label=new Label(), label_1 = new Label("预览:"); Button submit=new Button("确定"), resert=new Button("取消"); TextField 字体=new TextField(), 字形=new TextField(), 大小=new TextField(); List list1=new List(7,false), list2=new List(7,false), list3=new List(7,false); Font f; FontWin(String s) { super(s); setResizable(false); setBounds(100, 100, 486,475); Panel panel = new Panel(); panel.setLayout(null); GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment(); String fontName[]=ge.getAvailableFontFamilyNames(); String[] fontGlyph={"常规","斜体","粗体","粗斜体"}; String[] fontSize={"8","9","10","11","12","14","16","18","20","22","24","26","28","36","48","72"}; for(int i=0;i<fontName.length;i++) { list1.add(fontName[i]); } for(int i=0;i<fontGlyph.length;i++) { list2.add(fontGlyph[i]); } for(int i=0;i<fontSize.length;i++) { list3.add(fontSize[i]); } lfont.setBounds(10, 11, 35, 20); panel.add(lfont); 字体.setBounds(10, 32, 120, 21); panel.add(字体); list1.setBounds(10,54,120,200); panel.add(list1); lglyph.setBounds(151, 11, 35, 20); panel.add(lglyph); 字形.setBounds(151, 32, 120, 21); panel.add(字形); list2.setBounds(151,54,120,200); panel.add(list2); label_1.setBounds(151, 255, 35, 20); panel.add(label_1); label.setBounds(151, 271, 207, 63); label.setBackground(new Color(255, 255, 255)); label.setText("字体样式 AaBbCc"); label.setBackground(Color.green); panel.add(label); lsize.setBounds(285, 12, 35, 20); panel.add(lsize); 大小.setBounds(285, 32, 73, 21); panel.add(大小); list3.setBounds(285,54,120,200); panel.add(list3); submit.setBounds(154, 340, 100, 25); submit.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { setVisible(false); } }); panel.add(submit); resert.setBounds(258, 340, 100, 25); panel.add(resert); add(panel, BorderLayout.CENTER); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); //关闭窗口事件 list1.addItemListener(this); list2.addItemListener(this); list3.addItemListener(this); submit.addActionListener(this); resert.addActionListener(this); setVisible(true); validate(); } public void itemStateChanged(ItemEvent e) { String name=list1.getSelectedItem(); String style=list2.getSelectedItem(); String size=list3.getSelectedItem(); 字体.setText(name); 字形.setText(style); 大小.setText(size); int intstyle=0; int intSize = Integer.parseInt(size); if(style.equals("常规")) intstyle=Font.PLAIN; if(style.equals("粗体")) intstyle=Font.BOLD; if(style.equals("斜体")) intstyle=Font.ITALIC; if(style.equals("粗斜体")) intstyle=Font.BOLD+Font.ITALIC; f = new Font("name",intstyle,intSize); label.setFont(f); } public void actionPerformed(ActionEvent e) { if(e.getSource()==resert) System.exit(0); }}public class w2{ public static void main(String[] args) { FontWin f=new FontWin("字体"); } }
给你调了一下。。你报错是没有初始化。。字形，字体，，大小。。package com.test.exam;import java.awt.BorderLayout;import java.awt.Button;import java.awt.Color;import java.awt.Font;import java.awt.Frame;import java.awt.GraphicsEnvironment;import java.awt.Label;import java.awt.List;import java.awt.Panel;import java.awt.TextField;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class TxtTest { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub FontWin f = new FontWin("字体"); }}class FontWin extends Frame implements ItemListener, ActionListener { Label lfont = new Label("字体:"), lglyph = new Label("字形:"), lsize = new Label("大小:"), label = new Label(), label_1 = new Label("预览:"); Button submit = new Button("确定"), resert = new Button("取消"); TextField 字体 = new TextField(), 字形 = new TextField(), 大小 = new TextField(); List list1 = new List(7, false), list2 = new List(7, false), list3 = new List(7, false); Font f; FontWin(String s) { super(s); setResizable(false); setBounds(100, 100, 486, 475); Panel panel = new Panel(); panel.setLayout(null); GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); String fontName[] = ge.getAvailableFontFamilyNames(); String[] fontGlyph = { "常规", "斜体", "粗体", "粗斜体" }; String[] fontSize = { "8", "9", "10", "11", "12", "14", "16", "18", "20", "22", "24", "26", "28", "36", "48", "72" }; for (int i = 0; i < fontName.length; i++) { list1.add(fontName[i]); } for (int i = 0; i < fontGlyph.length; i++) { list2.add(fontGlyph[i]); } for (int i = 0; i < fontSize.length; i++) { list3.add(fontSize[i]); } lfont.setBounds(10, 11, 35, 20); panel.add(lfont); 字体.setBounds(10, 32, 120, 21); panel.add(字体); list1.setBounds(10, 54, 120, 200); panel.add(list1); lglyph.setBounds(151, 11, 35, 20); panel.add(lglyph); 字形.setBounds(151, 32, 120, 21); panel.add(字形); list2.setBounds(151, 54, 120, 200); panel.add(list2); label_1.setBounds(151, 255, 35, 20); panel.add(label_1); label.setBounds(151, 271, 207, 63); label.setBackground(new Color(255, 255, 255)); label.setText("字体样式 AaBbCc"); label.setBackground(Color.green); panel.add(label); lsize.setBounds(285, 12, 35, 20); panel.add(lsize); 大小.setBounds(285, 32, 73, 21); panel.add(大小); list3.setBounds(285, 54, 120, 200); panel.add(list3); submit.setBounds(154, 340, 100, 25); submit.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { setVisible(false); } }); panel.add(submit); resert.setBounds(258, 340, 100, 25); panel.add(resert); add(panel, BorderLayout.CENTER); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); // 关闭窗口事件 list1.addItemListener(this); list2.addItemListener(this); list3.addItemListener(this); submit.addActionListener(this); resert.addActionListener(this); setVisible(true); validate(); } public void itemStateChanged(ItemEvent e) { String name = "宋体"; // 初始样式 int intstyle = Font.PLAIN; // 初始字形 int intSize = 12; //初始字体大小 if(list1.getSelectedItem() != null){ name = list1.getSelectedItem(); 字体.setText(name); } if(list2.getSelectedItem() != null){ String style = list2.getSelectedItem(); 字形.setText(style); if (style.equals("常规")) intstyle = Font.PLAIN; if (style.equals("粗体")) intstyle = Font.BOLD; if (style.equals("斜体")) intstyle = Font.ITALIC; if (style.equals("粗斜体")) intstyle = Font.BOLD + Font.ITALIC; } if(list3.getSelectedItem() != null){ intSize = Integer.parseInt(list3.getSelectedItem()); 大小.setText(String.valueOf(intSize)); } f = new Font(name, intstyle, intSize); label.setFont(f); } public void actionPerformed(ActionEvent e) { if (e.getSource() == resert) System.exit(0); }}