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1、动态地改变程序的动态地改变程序的 LookLook andand FeelFeel动态地改变程序的 Look and FeelUIManager.setLookAndFeel(“javax.swing.plaf.metal.MetalLookAndFeel“);SwingUtilities.updateComponentTreeUI(this); /对由this 所指示的组件重新设置外观注意：由于 JFrame、JApplet 等为重量级组件，因此它的外观只与操作系统平台有关系，在相同的操作系统平台下表现出相同的外观。1、Metal 风格 (默认)String lookAndFeel = “j
2、avax.swing.plaf.metal.MetalLookAndFeel“;UIManager.setLookAndFeel(lookAndFeel);2、Windows 风格String lookAndFeel = “com.sun.java.swing.plaf.windows.WindowsLookAndFeel“;UIManager.setLookAndFeel(lookAndFeel);3、Windows Classic 风格String lookAndFeel = “com.sun.java.swing.plaf.windows.WindowsClassicLookAndFee
3、l“;UIManager.setLookAndFeel(lookAndFeel);4、Motif 风格String lookAndFeel = “com.sun.java.swing.plaf.motif.MotifLookAndFeel“;UIManager.setLookAndFeel(lookAndFeel);5、Mac 风格 (需要在相关的操作系统上方可实现)String lookAndFeel = “com.sun.java.swing.plaf.mac.MacLookAndFeel“;UIManager.setLookAndFeel(lookAndFeel);6、GTK 风格 (需
4、要在相关的操作系统上方可实现)String lookAndFeel = “com.sun.java.swing.plaf.gtk.GTKLookAndFeel“;UIManager.setLookAndFeel(lookAndFeel);7、可跨平台的默认风格String lookAndFeel = UIManager.getCrossPlatformLookAndFeelClassName();UIManager.setLookAndFeel(lookAndFeel);8、当前系统的风格String lookAndFeel = UIManager.getSystemLookAndFeelCl
5、assName();UIManager.setLookAndFeel(lookAndFeel);在 Java 中让用户能够动态地更改应用的外观，可以给用户更好地体验，具体的实现方式是：1，先使用 UIManager.setLookAndFeel(String s)方法设定对应的外观2，再使用SwingUtilities.updateComponentTreeUI(Component c)方法立刻更新应用的外观这两个类均在 javax.swing 包中样例：import java.awt.*;import java.awt.event.*;import javax.swing.*;public
6、class LookAndFeelDemo extends JFrame JPanel contentPane = new JPanel();JPanel jPanel1 = new JPanel();JRadioButton jRadioButton1 = new JRadioButton();JRadioButton jRadioButton2 = new JRadioButton();JRadioButton jRadioButton3 = new JRadioButton();JRadioButton jRadioButton4 = new JRadioButton();JRadioB
7、utton jRadioButton5 = new JRadioButton();static LookAndFeelDemo frame;public LookAndFeelDemo() try jbInit();catch(Exception e) public static void main(String args) /Windows 风格的窗口try UIManager.setLookAndFeel(“com.sun.java.swing.plaf.windows.WindowsLookAndFeel“); catch (Exception e) frame=new LookAndF
8、eelDemo();frame.setVisible(true);/窗口关闭时清空内存protected void processWindowEvent(WindowEvent e) if (e.getID() = WindowEvent.WINDOW_CLOSING) System.exit(0);private void jbInit() throws Exception contentPane=(JPanel)this.getContentPane();/设置窗口的标题,大小与布局setTitle(“窗口风格设置程序演示“);setSize(new Dimension(400,300);
9、contentPane.setLayout(null);/设置放置单选框容器的布局,位置,大小jPanel1.setLayout(new BoxLayout(jPanel1,BoxLayout.Y_AXIS);jPanel1.setBounds(new Rectangle(10, 10, 380, 280);/分别设置单选框的标题与 ActionCommand 属性(在动作事件中获取该变量)jRadioButton1.setText(“Windows 风格的窗口“);jRadioButton1.setActionCommand(“com.sun.java.swing.plaf.windows.
10、WindowsLookAndFeel“); /Windows 风格，只能在 Windows 系统下使用 jRadioButton2.setText(“跨平台风格的窗口“);jRadioButton2.setActionCommand(“UIManager.getCrossPlatformLookAndFeelClassName()“); / 跨平台风格，此时显示模式不要加引号jRadioButton3.setText(“Java 风格的窗口“);jRadioButton3.setActionCommand(“javax.swing.plaf.metal.MetalLookAndFeel“);
11、/java 平台默认外观，金属质感，可用在所有平台jRadioButton4.setText(“CDE/Motif 风格的窗口“);jRadioButton4.setActionCommand(“com.sun.java.swing.plaf.motif.MotifLookAndFeel“); /Motif风格，仿 UNIX 外观，可用在所有平台jRadioButton5.setText(“苹果机风格的窗口“);jRadioButton5.setActionCommand(“javax.swing.plaf.mac.MacLookAndFeel“); /Macintosh 风格，只能在 Mac
12、intosh 操作系统下使用/创建单选框接收器RadioListener radioListener=new RadioListener();/分别为各个单选框加入动作接收器jRadioButton1.addActionListener(radioListener);jRadioButton2.addActionListener(radioListener);jRadioButton3.addActionListener(radioListener);jRadioButton4.addActionListener(radioListener);jRadioButton5.addActionLi
13、stener(radioListener);/将单选框放入同一个容器内ButtonGroup group = new ButtonGroup();group.add(jRadioButton1);group.add(jRadioButton2);group.add(jRadioButton3);group.add(jRadioButton4);group.add(jRadioButton5);/向容器加入各种控件jPanel1.add(jRadioButton1, null);jPanel1.add(jRadioButton2, null);jPanel1.add(jRadioButton3,
14、 null);jPanel1.add(jRadioButton4, null);jPanel1.add(jRadioButton5, null);contentPane.add(jPanel1, null);/单选框的动作事件处理类class RadioListener implements ActionListener public void actionPerformed(ActionEvent e) String lnfName=e.getActionCommand();/重新设置平台的显示模式tryUIManager.setLookAndFeel(lnfName);catch(Exception el)/更新窗口的风格SwingUtilities.updateComponentTreeUI(frame);
