Java程序设计：更改Swing的Look and Feel UI皮肤

Java自身UI界面太丑怎么办？通过在加载窗口时加入以下代码就可以将Java应用程序GUI设置成当前系统风格：

try {
    // 设置本机系统外观
	UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
	e.printStackTrace();
}

根据UIManager源程序，

private static LookAndFeelInfo[] installedLAFs;

    static {
        ArrayList<LookAndFeelInfo> iLAFs = new ArrayList<LookAndFeelInfo>(4);
        iLAFs.add(new LookAndFeelInfo(
                      "Metal", "javax.swing.plaf.metal.MetalLookAndFeel"));
        iLAFs.add(new LookAndFeelInfo(
                      "Nimbus", "javax.swing.plaf.nimbus.NimbusLookAndFeel"));
        iLAFs.add(new LookAndFeelInfo("CDE/Motif",
                  "com.sun.java.swing.plaf.motif.MotifLookAndFeel"));

        // Only include windows on Windows boxs.
        OSInfo.OSType osType = AccessController.doPrivileged(OSInfo.getOSTypeAction());
        if (osType == OSInfo.OSType.WINDOWS) {
            iLAFs.add(new LookAndFeelInfo("Windows",
                        "com.sun.java.swing.plaf.windows.WindowsLookAndFeel"));
            if (Toolkit.getDefaultToolkit().getDesktopProperty(
                    "win.xpstyle.themeActive") != null) {
                iLAFs.add(new LookAndFeelInfo("Windows Classic",
                 "com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel"));
            }
        }
        else if (osType == OSInfo.OSType.MACOSX) {
            iLAFs.add(new LookAndFeelInfo("Mac OS X", "com.apple.laf.AquaLookAndFeel"));
        }
        else {
            // GTK is not shipped on Windows.
            iLAFs.add(new LookAndFeelInfo("GTK+",
                  "com.sun.java.swing.plaf.gtk.GTKLookAndFeel"));
        }
        installedLAFs = iLAFs.toArray(new LookAndFeelInfo[iLAFs.size()]);
    }

想要更改为windows样式只需要
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
就可以了。