用Java写一个关机程序（图形化界面恶搞朋友）

1.运行截图

2.代码实现

Game类

package com.zzu.Demo1;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;

public class Game {
    //创建CountDown对象
    CountDown cd = new CountDown();
    //创建标签
    JLabel jLabel = new JLabel("电脑将在" + cd.close.time + "秒后关机，输入”" + cd.close.input + "“则取消！");
    static JLabel label = new JLabel();
    static JFrame MyjFrame = new JFrame("shutdownApp1.0");
    //创建两个按钮
    static JButton ok = new JButton("确定");
    static JButton ca = new JButton("退出");
    //文本域
    static JTextField edit = new JTextField(8);
    JPanel jp01 = new JPanel();
    JPanel jp02 = new JPanel();
    static JPanel jp03 = new JPanel();
    JPanel jp04 = new JPanel();
    //创建Close对象
    Close cs = new Close();


    public Game() {
        //上传logo
        ImageIcon icon = new ImageIcon("520.jpg");
        Image image = icon.getImage();
        MyjFrame.setIconImage(image);

        //设置窗口大小位置
        MyjFrame.setSize(500, 500);
        MyjFrame.setLocation(400, 100);
        //设置关闭窗口之后程序随之关闭
        MyjFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //响应回车键
        MyjFrame.getRootPane().setDefaultButton(ok);
        //设置标签字体格式、大小、颜色
        jLabel.setFont(new java.awt.Font("行楷", 1, 16));
        jLabel.setForeground(Color.BLUE);
        label.setFont(new java.awt.Font("行楷", 1, 24));
        label.setForeground(Color.PINK);
        edit.setFont(new java.awt.Font("行楷", 1, 18));
        //添加布局
        jp01.add(jLabel);
        jp02.add(edit);
        jp03.add(label);
        jp04.add(ca);
        jp04.add(ok);
        MyjFrame.add(jp01);
        MyjFrame.add(jp02);
        MyjFrame.add(jp03);
        MyjFrame.add(jp04);
        //设置布局风格
        MyjFrame.setLayout(new GridLayout(5, 1));
        cs.close();
        MyjFrame.setVisible(true);

        cd.start();


        /***
         * 事件监听
         */
        ok.addActionListener(new ActionListener() {
            @SuppressWarnings("deprecation")
            public void actionPerformed(ActionEvent e) {
                if (edit.getText().equals(cs.input)) {
                    cs.cancel();
                    JOptionPane.showMessageDialog(null, "关机已取消！",
                            "", JOptionPane.INFORMATION_MESSAGE);
                    cd.stop(); //线程停止
                    edit.setEnabled(false);
                    ok.setEnabled(false);
                    ca.setEnabled(false);
                } else {
                    JOptionPane.showMessageDialog(null, "输入错误！",
                            "提示", JOptionPane.ERROR_MESSAGE);
                    edit.setText("");
                }
            }
        });
        ca.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null, "确定要退出吗？电脑依然会关机的！",
                        "提示", JOptionPane.ERROR_MESSAGE);
            }
        });
    }

    public static void main(String[] args) {
        new Game();
    }

}

CountDown类

package com.zzu.Demo1;

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

public class CountDown extends Thread{
    Close close = new Close();
    String str;

    /***
     *书写线程要执行的代码
     */
    public void run() {
        while (true) {
            try {//让线程休眠指定的时间，单位为毫秒
                Thread.sleep(1000);
            } catch (InterruptedException e) {
            }
            close.time--;
            if (close.time == 10) {//当只剩下10秒时
                JLabel sb = new JLabel("倒计时十秒");
                sb.setFont(new java.awt.Font("隶书", 1, 24));
                sb.setBackground(Color.GREEN);
                JPanel pa = new JPanel();
                pa.add(sb);
                Game.MyjFrame.add(pa);
                Game.MyjFrame.setVisible(true);
                Game.edit.setVisible(false);
                Game.ca.setEnabled(false);
                Game.ok.setEnabled(false);
            }
            str = "倒计时：" + close.time;
            Game.label.setText(str);
            Game.jp03.add(Game.label);
            if (close.time == 0) {
                System.exit(0);
            }
        }
    }

}

Close类

package com.zzu.Demo1;
/**
 *shutdown: 关机
 *加上参数才能执行
 *-s: 默认在一分钟之后关机
 *-s -t 指定时间：指定关机时间
 *-a: 取消关机操作
 *-r: 关机并重启
 */
public class Close {
    Runtime rTime = Runtime.getRuntime();
    int time = 60;//设置关机时间
    String input = "我就是笨蛋";

    public void close() {
        try {//运行cmd命令
            rTime.exec("shutdown -s -t " + time);
        } catch (Exception e) {
        }
    }

    public void cancel() {
        try {//运行cmd命令
            rTime.exec("shutdown -a");//取消关机
        } catch (Exception e) {
        }
    }

}