如何实现随机改变颜色??

[hooligan000112003]

import java.applet.*;
import java.awt.*;
import java.util.*;

public class A extends Applet
{
public void paint(Graphics g)
{
int x,y,z;
Random rand = new Random();
int i, j, k;

i = rand.nextInt() % 255;
j=rand.nextInt() % 255;
k=rand.nextInt() % 255;
Color c=new Color(i,j,k);
g.getColor(c);
g.drawString("Hello World!",50,50);
g.drawOval(100,200,50,60);
}
}
为什么不对？请指点，谢谢