一个有关背景（透明）颜色设置的问题？

[N798588567]

import java.applet.*;
代码如下：

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
class YY1 extends Applet
{int i=0;
public void paint(Graphics g)
{

g.setFont(new Font("",1,30));

switch (i){
case 0:g.drawString("没",0,30);
try{Thread.sleep(500);}catch(InterruptedException e){}

i++; repaint();
break;
case 1:g.drawString("没事",0,30);
try{Thread.sleep(500);}catch(InterruptedException e){}

i++;
repaint();
break;
case 2:g.drawString("没事的",0,30);
try{Thread.sleep(500);}catch(InterruptedException e){}

i++;
repaint();
break;
case 3:g.drawString("没事的时",0,30);
try{Thread.sleep(500);}catch(InterruptedException e){}

i++;
repaint();
break;
case 4:g.drawString("没事的时候",0,30);
try{Thread.sleep(500);}catch(InterruptedException e){}

i++;
repaint();
break; case 5:g.drawString("没事的时候写",0,30);
try{Thread.sleep(500);}catch(InterruptedException e){}

i++;
repaint();
break; case 6:g.drawString("没事的时候写写",0,30);
try{Thread.sleep(500);}catch(InterruptedException e){}

i++; repaint();
break; case 7:g.drawString("没事的时候写写代",0,30);
try{Thread.sleep(500);}catch(InterruptedException e){}

i++; repaint();
break;
case 8:g.drawString("没事的时候写写代码",0,30);
try{Thread.sleep(500);}catch(InterruptedException e){}
i++;
repaint();
break;
case 9:g.drawString("没事的时候写写代码……",0,30);
try{Thread.sleep(500);}catch(InterruptedException e){}
i=0;
repaint();
break;
}

}
}
class YY implements Runnable{

YY(){
YY1 y = new YY1();
Window w = new Window(null);
w.setLayout(null);
w.add(y);
y.setBounds(0,0,600,40);
y.setBackground(new Color(0,255,0,0));
w.setSize(400,400);
w.setVisible(true);
w.setBounds(300,50,600,40);
w.setBackground(new Color(0,0,255,0));
w.toBack();

}
public void run()
{
new YY1();
}
public static void main(String [] arge)
{
Thread r = new Thread(new YY());
r.start();
}
}

本来照我的想法，这东东在桌面上显示出来的，应该就只有那几个字，不应该会有背景颜色的，可是无论我怎么改，总会有背景颜色，各位大吓们，能否帮小弟解决这个问题，谢谢！！！

[pjw100]

把颜色去掉试试，还有楼主发错版块了，收别发抖，发抖容易敲错代码。

[N798588567]

呵呵,可是不行啊,我那样也试过啦!!能不能帮我改改啊,谢谢!!

[huangwj20042008]

用jdk1.6吧，有个AWTUtilities类，里面有个setOpacy()方法，可以设置透明窗口。1.6以下的版本不知道能不能设。

[goodmrning]

up\!

[N798588567]

大虾们啊,能不能告诉我上面那段代码为什么不能使背景颜色是透明的不?我明明设置了它为透明的啊