BorderLayout

//<applet code=JButton1 width=400 height=500>
//</applet>

 

import javax.swing.*;
import java.awt.*;

public class JButton1 extends JApplet
{
 
  JButton testButton1=new JButton("button1");
  JButton testButton2=new JButton("button2");
  JButton testButton3=new JButton("button3");
  JButton testButton4=new JButton("button4");
  JButton testButton5=new JButton("button5");

 

  public void init(){
   Container cp=getContentPane();

   
   cp.setLayout(new BorderLayout());
   
   cp.add(testButton1,BorderLayout.NORTH);//静态方法，不过也可用类对象访问，为什么？
   cp.add(testButton2,BorderLayout.SOUTH);
   cp.add(testButton3,BorderLayout.EAST);
   cp.add(testButton4,BorderLayout.WEST);
   cp.add(testButton5,BorderLayout.CENTER);
   
  }
 
}

 

因 处JButton1误写成JButtton1，用AppletViewer运行错误，找了半天，错误如下： 如果有经验的话应该一眼就能看出来，晕！