import java.awt.*;import java.awt.event.*;import java.io.IOException;import java.util.Calendar;import javax.swing.*;public class CloseComputer extends JFrame implements ActionListener{//创建成员变量//创建实现BorderLayout布局的面板对象panelmain,用于放panelSubnorth面板和panelSubcenter面板private JPanel panelMain;//创建实现FlowLayout布局的面板对象panelSubnorth,用于放tag提示标签private JPanel panelSubnorth;//创建实现FlowLayout布局的面板对象panelSubcenter,用于放3个按钮private JPanel panelSubcenter;//创建三个按钮private Button countdown;private Button time;private Button cancel;private String key;//创建一个提示标签private JLabel tag;public CloseComputer(){initComponents();}/** * 初始化组件信息 */public void initComponents() {panelMain=new JPanel(new BorderLayout(5, 10));panelSubnorth=new JPanel(new FlowLayout(3));panelSubcenter=new JPanel(new FlowLayout(1,5,5));countdown=new Button("倒计时关机");time=new Button("定时关机");cancel=new Button("取消关机");tag=new JLabel("请选择关机方式");//将panelMain添加到窗体中this.getContentPane().add(panelMain);//添加对象panelSubnorth到对象panelMain窗口里panelMain.add(panelSubnorth, BorderLayout.NORTH);//添加对象panelSubcenter到对象panelMain窗口里panelMain.add(panelSubcenter, BorderLayout.CENTER);//添加标签对象tag到对象panelSubnorth窗口里panelSubnorth.add(tag);//添加3个按钮到对象panelSubcenter里panelSubcenter.add(countdown);panelSubcenter.add(time);panelSubcenter.add(cancel);//为3个按钮注册事件监听器countdown.addActionListener(this);time.addActionListener(this);cancel.addActionListener(this);this.setDefaultCloseOperation(EXIT_ON_CLOSE);this.setResizable(false);this.setLocation(350, 350);this.setSize(400, 400);this.setTitle("关机工具");this.pack();}/** * 倒计时关机 */public void countdown() {//创建字符串面板对象key=JOptionPane.showInputDialog(this,"请输入倒计时关机剩余的时间(秒)","输入框",1);try {Runtime.getRuntime().exec("shutdown -s -t "+key);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/** * 定时关机 */public void time(){//获取当前系统的时间Calendar calendar=Calendar.getInstance();int h=calendar.get(Calendar.HOUR);//获取小时System.out.println(h);int m=calendar.get(Calendar.MINUTE);//获取分钟int s=calendar.get(Calendar.SECOND);//获取秒String hourtmp,minutetmp,secordtmp;//保存输入的时间int hour,minute,secord;//保存转换后的时间//输入时间hourtmp=JOptionPane.showInputDialog(this,"请输入关机的小时(12小时制)","输入",1);minutetmp=JOptionPane.showInputDialog(this,"请输入关机的分钟","输入",1);secordtmp=JOptionPane.showInputDialog(this,"请输入关机的秒钟","输入",1);//转换时间hour=Integer.parseInt(hourtmp);minute=Integer.parseInt(minutetmp);secord=Integer.parseInt(secordtmp);long setTime=timeSum(hour, minute, secord);//计算输入时间的总和long currentlyTime=timeSum(h, m, s);//计算当前系统时间的总和long discrepancyTime=setTime-currentlyTime;//获取时间差if (discrepancyTime<0) {try {Runtime.getRuntime().exec("shutdown -s");} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}else {try {Runtime.getRuntime().exec("shutdown -s -t "+discrepancyTime);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}JOptionPane.showMessageDialog(this, "恭喜你,设置成功!", "确认", 2);}}/** * 计算出时间总和,并返回 * @param h * @param m * @param s * @return */public int timeSum(int h,int m,int s) {int sum=h*3600+m*60+s;return sum;}/** * 取消关机 */public void cancel() {JOptionPane.showMessageDialog(this, "你已经成功取消了关机操作!", "消息", 2);try {Runtime.getRuntime().exec("shutdown -a");} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public static void main(String[] args) {java.awt.EventQueue.invokeLater(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubnew CloseComputer().setVisible(true);}});}@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubif (e.getSource() == countdown) {countdown();}if (e.getSource() == time) {time();}if (e.getSource() == cancel) {cancel();}}}
，走马观花之外，这才是深入体验，探索自我的最佳时间，
