懒得写说明了，大家应该能看懂。这是一个透明面板的例子，可仿此法制作其它透明组件。有问题给我来信。8-）

希望与大家分享经验。

package com.borland.samples.welcome;

import java.awt.*;

public class MyPanel extends Panel {

private Image bi; // offscreen image

private Graphics big; // Graphics for the offscreen image

public void update(Graphics g) {

paint(g);

}

public void paint(Graphics g) {

if (bi == null) { // you can't do this from the constructor

bi = createImage(getSize().width,getSize().height);

big = bi.getGraphics();

}

Rectangle area = g.getClipBounds(); // this is the area that needs to be (re)painted (no need to repaint everything)

big.setClip(area);

big.clearRect(area.x, area.y, area.width, area.height); // fills the area with the background color // the next statement will call the paint methods for the other panels/components you have added to this panel // and draw them to the offscreen image

super.paint(big);// now draw the offscreen image to the panel

g.drawImage(bi,area.x, area.y, area.x+area.width, area.y+area.height,area.x, area.y, area.x+area.width, area.y+area.height,this);

}

}