哪位高手会写让电脑关机的java程序

import java.awt.*;import java.awt.event.*;import java.io.*;import javax.swing.*;import javax.swing.border.*;class WindowOperations extends JFrame implements ActionListener{  JRadioButton shut, restart, logoff;  public WindowOperations(){    super("Window");    setSize(200,200);    setResizable(false);    setVisible(true);    JPanel p1 = new JPanel();    p1.setLayout(new BoxLayout(p1, BoxLayout.Y_AXIS));    p1.setBorder(new TitledBorder(new EtchedBorder(), "Operations"));    ButtonGroup group = new ButtonGroup();    shut = new JRadioButton("Shutdown (F1)");    restart = new JRadioButton("Restart (F2)");    logoff = new JRadioButton("Logoff (F3)");    group.add(shut);    group.add(restart);    group.add(logoff);    shut.addActionListener(this);    restart.addActionListener(this);    logoff.addActionListener(this);    p1.add(shut);    p1.add(restart);    p1.add(logoff);    getContentPane().add(p1, BorderLayout.CENTER);    JPanel p2 = new JPanel();    JButton ok = new JButton("OK");    ok.addActionListener(this);    p2.add(ok);    getContentPane().add(p2, BorderLayout.SOUTH);    addKeyListener(new KeyAdapter(){      public void keyPressed(KeyEvent ke){        try{          switch(ke.getKeyCode()){          case KeyEvent.VK_F1:            Shutdown();            break;          case KeyEvent.VK_F2:            Restart();            break;            case KeyEvent.VK_F3:            Logoff();            break;        }        }catch(IOException e){}      }    });    requestFocus();    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();    setLocation((screenSize.width - getWidth())/2, (screenSize.height - getHeight())/2);    pack();    setDefaultCloseOperation(EXIT_ON_CLOSE);  }  public void Shutdown() throws IOException{    Process p = Runtime.getRuntime().exec("shutdown -s -t 00");    }  public void Restart() throws IOException{    Process p = Runtime.getRuntime().exec("shutdown -r -t 00");    }  public void Logoff() throws IOException{    Process p = Runtime.getRuntime().exec("shutdown -l");    }  public void actionPerformed(ActionEvent ae){    String str = ae.getActionCommand();    if(str.equals("OK")){      try{         if(shut.getText()=="Shutdown (F1)"){           Shutdown();         }         if(restart.getText()=="Restart (F2)"){           Restart();         }         if(logoff.getText()=="Logoff (F3)"){           Logoff();         }      }catch(IOException e){}    }  }  public static void main(String[] args) throws IOException{    new WindowOperations();  }}
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java 语言本身是无法做到关闭电脑的，想要实现关机的话需要调用 其他的语言 命令，像上面这个实例最关键的就是JVM开了一个新的进程 执行windows命令行的 shutdowm命令，所以上面只能适用于windows,如果linux需要调用linux的shell命令做

如果你windows的话直接用上面的就OK了，只是没有跨平台性
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java 语言本身是无法做到关闭电脑的，想要实现关机的话需要调用 其他的语言 命令，像上面这个实例最关键的就是JVM开了一个新的进程 执行windows命令行的 shutdowm命令，所以上面只能适用于windows,如果linux需要调用linux的shell命令做

如果你windows的话直接用上面的就OK了，只是没有跨平台性

------解决方案--------------------------------------------------------
Runtime.getRuntime().exec("shutdown -s ")