7行になった〜

N.java

import java.awt.*;import java.awt.image.*;import java.util.*;class N extends
Frame{int W=320,H=240;byte[]p=new byte[W*H];MemoryImageSource s;Image m;Random
r=new Random();void b(){for(int i=0;i<W*H;i++)p[i]=(byte)r.nextInt();}N(){b();s
=new MemoryImageSource(W,H,new IndexColorModel(8,256,p,p,p),p,0,W);
s.setAnimated(true);m=createImage(s);setSize(W,H);setVisible(true);}public void
update(Graphics g){b();s.newPixels();g.drawImage(m,0,0,null);repaint(20);}
public void paint(Graphics g){update(g);}static void main(String[]a){new N();}}