想用java做一个像windows里一样的txt编辑软件，涉及到字体设置选项卡，在网上找了很久都没找到，就生气啦自己写一个，现在贴这里分享一下，下次再遇到这样的问题就不用自己亲自打代码啦！

package 实验; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.*; import javax.swing.border.BevelBorder; /** * 字体格式设置对话框 */ public class FontFormat extends JDialog { private JLabel nameLb; private JLabel styleLb; private JLabel sizeLb; private JLabel presLb; private JTextField nameTx; private JTextField styleTx; private JTextField sizeTx; private JTextField presTx; private JList nameLt; private JList styleLt; private JList sizeLt; private JScrollPane jScrollPane1; private JScrollPane jScrollPane2; private JScrollPane jScrollPane3; private JButton approve; private JButton cancel; private JButton chose; private JRadioButton[] language = new JRadioButton[2]; private ButtonGroup languageg; private String Slanguage[] = { new String("李涛"), new String("ABC") }; private static JFrame frame; public Font font, newFont;// 字体类 private Color color;// 颜色类 Color newColor; private JFileChooser fileChoose = new JFileChooser();// 文件选择类实例 private JDialog colorDlg;// 颜色对话框 private JColorChooser colorChoose = new JColorChooser();// 颜色选择类实例 private GraphicsEnvironment environment; // 该类中又获取系统字体的方法； private String[] fontNameSet;// 字体‘逻辑名'集 // 字体‘样式'集的字符串数组 private String[] fontStyleSet = { "常规", "倾斜", "加粗", "倾斜 加粗" }; // 字体‘样式'集的常量数组 private Integer[] fontCon = { Font.PLAIN, Font.ITALIC, Font.BOLD, Font.BOLD | Font.ITALIC }; // 字体‘大小'集 private String[] fontSizeSet = { "6", "7", "8", "9", "10", "11", "12", "14", "16", "18", "20", "22", "24", "26", "28", "36", "48", "72" }; public static void main(String args[]) {// 主函数 FontFormat a = new FontFormat(); a.setVisible(true); } public FontFormat() {// 无参构造函数 super(frame, "李涛—字体设置窗口", true); frame = new JFrame(); initGUI(); } public FontFormat(JFrame frame) {// 含参构造函数 super(frame, "李涛—字体设置窗口", true); this.frame = frame;// 父窗口中必须有一个public的Font对象 // setAlwaysOnTop(true); initGUI(); } private void initGUI() {// 字体格式选择器的界面初始化 try { getContentPane().setLayout(null); environment = GraphicsEnvironment.getLocalGraphicsEnvironment();// GraphicsEnvironment是一个抽象类，不能实例化，只能用其中的静态方法获取一个实例 fontNameSet = environment.getAvailableFontFamilyNames();// 获取系统字体 addMenu();// 加入菜单 initFont();// 初始化字体 // pack(); setSize(380, 337); setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); setWindowPos();// 使窗口屏幕居中 setResizable(false);// 大小不可变 } catch (Exception e) { e.printStackTrace(); } } private void initFont() {// 初始化字体 // 设置默认字体格式为父窗口font对向的字体格式 if (frame.getFont() == null) { nameTx.setText(fontNameSet[0]); styleTx.setText(fontStyleSet[0]); sizeTx.setText("12"); nameLt.setSelectedValue(fontNameSet[0], true); styleLt.setSelectedIndex(0); sizeLt.setSelectedValue("12", true); font = new Font(fontNameSet[0], fontCon[0], 12); newFont = font;// 保存原来的字体格式 presTx.setFont(font); // JOptionPane.showMessageDialog(null, "ccac"); } else { int idxStyle = 0; for (int i = 0; i < fontCon.length; i++) { if (fontCon[i] == frame.getFont().getStyle()) idxStyle = i; } nameTx.setText(frame.getFont().getName());// 改text styleTx.setText(fontStyleSet[idxStyle]); sizeTx.setText("" + frame.getFont().getSize()); nameLt.setSelectedValue(frame.getFont().getName(), true);// 改list显示 styleLt.setSelectedIndex(idxStyle); sizeLt.setSelectedValue("" + frame.getFont().getSize(), true); font = new Font(fontNameSet[0], fontCon[0], 12);// 保存当前格式 newFont = font;// 保存原来的字体格式 presTx.setFont(font);// 预览中设为当前模式 } } private void addMenu() {// 加入菜单 // 4个lable--------------------------------------------------------------------------------- nameLb = new JLabel(); getContentPane().add(nameLb); nameLb.setText("字体："); nameLb.setBounds(10, 14, 120, 26); nameLb.setFont(new java.awt.Font("SimSun", 1, 14)); styleLb = new JLabel(); getContentPane().add(styleLb); styleLb.setText("字型："); styleLb.setBounds(151, 14, 120, 23); styleLb.setFont(new java.awt.Font("SimSun", 1, 14)); sizeLb = new JLabel(); getContentPane().add(sizeLb); sizeLb.setText("大小："); sizeLb.setBounds(275, 14, 79, 24); sizeLb.setFont(new java.awt.Font("SimSun", 1, 14)); presLb = new JLabel(); getContentPane().add(presLb); presLb.setText("预览："); presLb.setBounds(151, 150, 120, 80); presLb.setFont(new java.awt.Font("SimSun", 1, 14)); // 4个textfield--------------------------------------------------------------------------------- nameTx = new JTextField(); nameTx.setEditable(false); getContentPane().add(nameTx); nameTx.setBounds(10, 42, 120, 22); styleTx = new JTextField(); styleTx.setEditable(false); getContentPane().add(styleTx); styleTx.setBounds(151, 42, 100, 21); sizeTx = new JTextField(); sizeTx.setEditable(false); getContentPane().add(sizeTx); sizeTx.setBounds(275, 42, 79, 22); presTx = new JTextField(); presTx.setEditable(false); getContentPane().add(presTx); presTx.setBounds(151, 200, 203, 61); presTx.setText(Slanguage[1]); // 3个下拉条--+监听----------------------------------------------------------------------------- jScrollPane1 = new JScrollPane(); getContentPane().add(jScrollPane1); jScrollPane1.setBounds(10, 74, 120, 210); { ListModel fontNameModel = new DefaultComboBoxModel(fontNameSet); nameLt = new JList(); jScrollPane1.setViewportView(nameLt); nameLt.setModel(fontNameModel); nameLt.setBounds(274, 193, 90, 86); nameLt.setBorder(BorderFactory .createEtchedBorder(BevelBorder.LOWERED)); nameLt.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent evt) { nameLtMouseClicked(evt); } }); } jScrollPane2 = new JScrollPane(); getContentPane().add(jScrollPane2); jScrollPane2.setBounds(151, 74, 100, 103); { ListModel fontStyleModel = new DefaultComboBoxModel(fontStyleSet); styleLt = new JList(); jScrollPane2.setViewportView(styleLt); styleLt.setModel(fontStyleModel); styleLt.setBounds(310, 215, 70, 102); styleLt.setBorder(BorderFactory .createEtchedBorder(BevelBorder.LOWERED)); styleLt.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent evt) { styleLtMouseClicked(evt); } }); } jScrollPane3 = new JScrollPane(); getContentPane().add(jScrollPane3); jScrollPane3.setBounds(275, 75, 79, 100); { ListModel fontSizeModel = new DefaultComboBoxModel(fontSizeSet); sizeLt = new JList(); jScrollPane3.setViewportView(sizeLt); sizeLt.setModel(fontSizeModel); sizeLt.setBounds(300, 218, 54, 102); sizeLt.setBorder(BorderFactory .createEtchedBorder(BevelBorder.LOWERED)); sizeLt.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent evt) { sizeLtMouseClicked(evt); } }); }// ------------------------------------------------------------------------------------- // 中英选项(--------------------------------------------------------------------------------- languageg = new ButtonGroup(); language[0] = new JRadioButton("中"); getContentPane().add(language[0]); language[0].setSelected(false);// 初始化显示 language[0].setBounds(271, 179, 40, 20); language[0].setFont(new java.awt.Font("SimSun", 1, 12)); languageg.add(language[0]); language[0].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { presTx.setText(Slanguage[0]); } }); language[1] = new JRadioButton("英"); getContentPane().add(language[1]); language[1].setSelected(true); language[1].setBounds(321, 179, 40, 20); language[1].setFont(new java.awt.Font("SimSun", 1, 12)); languageg.add(language[1]); language[1].addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { presTx.setText(Slanguage[1]); } }); // 3个按钮+监听--------------------------------------------------------------------------------- // 确定按钮 approve = new JButton(); getContentPane().add(approve); approve.setText("确定"); approve.setBounds(151, 265, 67, 20); approve.setFont(new java.awt.Font("KaiTi_GB2312", 1, 12)); approve.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { approveActionPerformed(evt); } }); // 取消按钮 cancel = new JButton(); getContentPane().add(cancel); cancel.setText("取消"); cancel.setBounds(219, 265, 67, 20); cancel.setFont(new java.awt.Font("KaiTi_GB2312", 1, 12)); cancel.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { cancelActionPerformed(evt); } }); // 颜色选择按钮 chose = new JButton(); getContentPane().add(chose); chose.setText("颜色"); chose.setBounds(287, 265, 67, 20); chose.setFont(new java.awt.Font("KaiTi_GB2312", 1, 12)); chose.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { choseActionPerformed(evt); } });// ------------------------------------------------------------------------- } private void setWindowPos() {// 窗口居中 Toolkit kit = Toolkit.getDefaultToolkit();// 抽象类，通过静态方法获取实例 Dimension frameSize = new Dimension(), screenSize = kit.getScreenSize(); // 获取屏幕的大小 getSize(frameSize); // 获取窗口大小 setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2); } private void nameLtMouseClicked(MouseEvent evt) {// 字体逻辑名列表的鼠标单击事件 nameTx.setText(nameLt.getSelectedValue().toString()); font = new Font(nameTx.getText(), font.getStyle(), font.getSize()); presTx.setFont(font); } private void styleLtMouseClicked(MouseEvent evt) {// 字体样式列表的鼠标单击事件 String temp = styleLt.getSelectedValue().toString(); styleTx.setText(temp); int index = 0; while (index < 4 && !fontStyleSet[index].equals(temp)) { index++; } font = new Font(font.getName(), fontCon[index], font.getSize()); presTx.setFont(font); } private void sizeLtMouseClicked(MouseEvent evt) {// 字体大小列表的鼠标点击事件 sizeTx.setText(sizeLt.getSelectedValue().toString()); font = new Font(font.getName(), font.getStyle(), Integer.parseInt(sizeTx.getText())); presTx.setFont(font); } private void approveActionPerformed(ActionEvent evt) {// 确定按钮的触发事件 String name = nameTx.getText(); int style = fontCon[styleLt.getSelectedIndex()]; int size = Integer.parseInt(sizeTx.getText()); font = new Font(name, style, size); frame.setFont(font); // 父窗口的Font对象 newFont = font;// 更新原来保存格式 newColor = color;// 更新颜色 this.dispose(); } private void cancelActionPerformed(ActionEvent evt) {// 取消按钮的触发事件 this.dispose(); } private void choseActionPerformed(ActionEvent evt) {// 颜色选择触发事件 if (colorDlg == null) { colorDlg = JColorChooser.createDialog(FontFormat.this, "Select Text Color", true, colorChoose, new ColorOKListener(), null); } colorChoose.setColor(color = presTx.getForeground()); colorDlg.setVisible(true); } class ColorOKListener implements ActionListener {// 重写颜色按钮点击监听类覆盖接口ActionListener public void actionPerformed(ActionEvent e) { Color c = colorChoose.getColor(); color = c; presTx.setForeground(c); presTx.repaint(); } } }

效果如下：

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