package cqu.gui;

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); //设置窗体大小

setLocation(400, 400); //设置窗体显示位置

setTitle("ButtonFrame"); //设置窗体标题栏

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //设置窗体默认关闭事件

setLayout(new FlowLayout()); //设置布局管理器

//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); //添加按键

}

public static void main(String[] args) {

SwingFrame frame=new SwingFrame();

frame.setVisible(true); //显示窗体

}

}