showline.java

来自「这是《Java 2 简明教程(第2版)》一书配套的源代码。」· Java 代码 · 共 26 行

import java.awt.*;
import java.awt.image.*;
import java.applet.*;

public class ShowLine extends Applet
{
  Image img; 
  
  public void init()
  {
     int w=256;
     int h=256;
     int pix[]=new int[w*h];
     int index=0;
 
     for(int red=0; red<h; red++)
      for(int blue=0; blue<w; blue++)
       pix[index++]=(255<<24)|(red<<16)|blue;
     img=createImage(new MemoryImageSource(w,h,pix,0,w));
   }
   public void paint(Graphics g)
   {
      g.drawImage(img,50,50,this);
   }
}