hw16_7.java

java的一些关于多线程

import java.awt.*;
import java.awt.event.*;
class hw16_7 extends Frame implements ActionListener
{
   static hw16_7 frm=new hw16_7(); 
   static Button btn=new Button("Click Me");
   
   public static void main(String args[])
   {  
      btn.addActionListener(frm);    
      frm.setLayout(new BorderLayout());
      frm.setTitle("Action Event");
      frm.setSize(200,150);
      frm.add(btn);
      frm.setVisible(true);
   }
   
   public void actionPerformed(ActionEvent e)  
   {
      if(btn.getLabel()=="Click Me")   
         btn.setLabel("Click Me Again");
      else
         btn.setLabel("Click Me");
   }   
}