java程序的界面编程详解

在Java中可以为程序自定义程序界面选择Windows、Unix、Java或Macintosh外观。甚至可以在程序运行时让用户自由的选择外观。

UIManager和SwingUtilities类

UIManager类保留了当前外观的信息，而SwingUtilities提供了几种实用的方法，尤其是UIManager类提供的静态方法setLookAndFeel。

一般的“界面”类如下：

javax.swing.plaf.metal.MetalLookAndFeel；

com.sun.java.swing.plaf.windows.WindowsLookAndFeel；

com.sun.java.swing.plaf.motif.MotifLookAndFeel;

可以来创建以下界面：

1：Java界面

2：Unix界面

3：与操作系统和谐的界面

4：跨平台的界面

定义Java的界面：

try

{

String style = "javax.swing.plaf.metal.MetalLookAndFeel";

UIManager.setLookAndFeel(style);

}

catch (Exception e)

{

System.err.println("Exception: " + e);

}

定义与Unix界面：

try

{

String style = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";

UIManager.setLookAndFeel(style);

}

catch (Exception e)

{

System.err.println("Exception: " + e);

}

定义与操作系统和谐的界面：

try

{

String style = UIManager.getSystemLookAndFeelClassName();

UIManager.setLookAndFeel(style);

}

catch (Exception e)

{

System.err.println("Exception: "  + e);

}

定义类似跨平台的界面：

try

{

String style = UIManager.getCrossPlatformLookAndFeelClassName();

UIManager.setLookAndFeel(style);

}

catch (Exception e)

{

System.err.println("Exception: " + e);

}

下面是一段完整的换界面的代码：

package WindowStyle; import javax.swing.*; import java.awt.FlowLayout; import java.awt.Container; import java.awt.event.*; public class windowstyle extends JFrame implements ActionListener { private JButton windLook = new JButton("Windows"); private JButton unixLook = new JButton("Unix"); private JButton javaLook = new JButton("Java"); private JLabel label= new JLabel("FlySky Young"); private class WindowCloser extends WindowAdapter { public void windowClosing(WindowEvent we) { System.exit(0); } } public windowstyle() { super("JFrame with Buttons"); Container content = getContentPane(); content.setLayout(new FlowLayout()); content.add(label); content.add(windLook); content.add(unixLook); content.add(javaLook); //添加按钮监听事件 windLook.addActionListener(this); unixLook.addActionListener(this); javaLook.addActionListener(this); validate(); pack(); setVisible(true); } public void actionPerformed(ActionEvent ae) { String style = "javax.swing.plaf.metal.MetalLookAndFeel"; if (ae.getSource() == windLook) { style = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel"; } else if (ae.getSource() == unixLook) { style = "com.sun.java.swing.plaf.motif.MotifLookAndFeel"; } try { UIManager.setLookAndFeel(style); SwingUtilities.updateComponentTreeUI(this); pack(); } catch (Exception e) { System.err.println("Exception: " + e); } } public static void main(String args[]) { windowstyle style = new windowstyle(); } }