使用Swing JButton的GUI程序

package _1;

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JOptionPane;

public class SwingFrame extends JFrame{

private JButton button=new JButton("按键");

public SwingFrame()

{

setSize(300,300);

setLocation(400,400);

setTitle("ButtonFrame");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setLayout(new FlowLayout());

//添加按键事件

button.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent event) {

JOptionPane.showMessageDialog(null,"点击了按键");

}

});

add(button);

}

public static void main(String[]args) {

SwingFrame frame=new SwingFrame();

frame.setVisible(true);

}

}