例7-28.java

医院无线局域网设计方案 医院无线局域网设计方案

//example 7-28
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
public class tt extends Applet implements ActionListener
{
   Button b[];
   String names[]={"one","two","three","four","five","six"};
   boolean toggle=true;
   public void init()
   {
   	 setLayout(new GridLayout(2,3,5,5));
   	 b=new Button[names.length];
   	 for(int i=0;i<names.length;i++)
   	 {
        b[i]=new Button(names[i]);
        b[i].addActionListener(this);
        add(b[i]);
   	 }
   }
   public void actionPerformed(ActionEvent e)
   {
   	 if(toggle)
   	    setLayout(new GridLayout(3,2));
   	 else
   	    setLayout(new GridLayout(2,3,5,5));
   	 toggle=!toggle;
   	 validate();
   }
}