exam.java

java学习课件

import java.awt.*; import java.applet.*;
public class Exam extends Applet
{	MyCanvas mycanvas=new MyCanvas();
	public void init()
	{ 
	  setLayout(new BorderLayout());
	  add("Center",mycanvas);
	  add("North",new Button("button1"));
	  add("South",new Button("button2"));
	  add("West",new Button("button3"));
	  add("East",new Button("button4"));
	}
 }
class MyCanvas extends Canvas
{	public void paint(Graphics g)
	{ g.setColor(Color.red);       
      g.fillRect(0,0,50,100);
      g.setColor(Color.blue);   
      g.fillRect(30,0,100,40);
    }
}