java学习笔记_GUI(2)

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

 class Gui implements ActionListener{

     JButton button = new JButton("click me");

     public void show() {
         JFrame frame = new JFrame();

         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

         frame.getContentPane().add(button);
         frame.setSize(300, 200);
         frame.setVisible(true);

         button.addActionListener(this);
     }

     public void actionPerformed( ActionEvent event ) {
         button.setText("I've been clicked!");
     }
 }

 class GuiTest {
     public static void main( String[] args ) {
         Gui gui = new Gui();
         gui.show();
     }
 }

这个例子演示了如何给BUTTON设置click之后的响应函数