关机小程序

package Lanmbda;

import javax.swing.*;
import java.io.IOException;

public class close{
    public static void main(String[] args) throws IOException {
          int i=10;
        Object[] options = { "确定", "取消" };
        JOptionPane.showOptionDialog(null, "电脑将强制关机", "警告",
                JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,
                null, options, options[0]);
      while(true){
          if (i==0)
              break;


          JOptionPane.showMessageDialog(null, i, "关机倒计时", JOptionPane.ERROR_MESSAGE);
          i--;
      }

        Runtime s= Runtime.getRuntime();
        s.exec("shutdown -s -t 00");
//        System.out.println("电脑已经关机");
    }
}