自动关机，,import java.

自动关机，,import java.

import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.text.DateFormat;import java.util.Date;import javax.swing.*;public class ShutDown extends JFrame implements ActionListener {    /**     *      */    private static final long serialVersionUID = 1L;    private JPanel jp1;    private JLabel jl1;    private JButton jb1;    private static String time;    private JTextField txt;    public ShutDown() {        super("自动关机小程序");        setSize(300, 200);        getContentPane();        setLocation(400, 200);        jb1 = new JButton("确定");        jb1.setLayout(null);        jb1.setBounds(new Rectangle(90, 105, 80, 30));        jb1.addActionListener(this);        jp1 = new JPanel();        jp1.setLayout(null);        jp1.setBounds(new Rectangle(0, 0, 300, 200));        jl1 = new JLabel("请输入时间（例如：17:25:00)");        jl1.setLayout(null);        jl1.setBounds(new Rectangle(50, 0, 300, 100));        txt = new JTextField();        txt.setLayout(null);        txt.setBounds(new Rectangle(60, 67, 150, 30));        jl1.setVisible(true);        jp1.add(jl1, null);        jp1.add(txt, null);        jp1.add(jb1, null);        jp1.setVisible(true);        getContentPane().add(jp1, null);        setVisible(true);        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    }    public void actionPerformed(ActionEvent evt) {        time = txt.getText();        setVisible(false);    }    public static void main(String[] args) {        new ShutDown();        Runtime run = Runtime.getRuntime();        Process process1 = null;                Boolean flag=true;        System.out.println(time);        while (flag) {            Date date = new Date();            DateFormat d1 = DateFormat.getTimeInstance();            String str = d1.format(date);            if (str.equals(time)) {                try {                    process1 = run.exec("shutdown /s /t 0");                                        flag=false;                } catch (Exception e1) {                    System.out.println("Wrong!!");                }                                try{                                   Thread.sleep(1000);   }catch(Exception e2){}            }        }    }}//该片段来自于http://byrx.net