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