如何编写 jButton 以将笔记本电脑或设备切换到节电模式

Question

I haven't tried any coding, because I'm inexperienced.

But for an application I'm currently making (for an assignment) I want to enable the user to turn the battery saver mode when the count down ended, (if the user previously selected the 'turn battery saver when resting' checkbox) the power-saver mode will be automatically enabled by the software. (OS - Windows 10).

Answer 1

You can implement such an action by executing a cmd command via the ProcessBuilder . I have put together a program that works for me:

public static void main(String[] args) throws Exception {

  JPanel panel = new JPanel();
  JFrame frame = new JFrame();
  frame.setSize(200, 200);
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.add(panel);

  JButton button = new JButton("Standby");
  panel.add(button);
  frame.setVisible(true);

  button.addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent e) {
      ProcessBuilder builder = new ProcessBuilder("cmd.exe", "/c", "rundll32.exe powrprof.dll,SetSuspendState");
      builder.redirectErrorStream(true);
      try {
        builder.start();
      } catch (IOException e1) {
        e1.printStackTrace();
      }
    }
  });
}

Maybe you need to change the command "rundll32.exe powrprof.dll,SetSuspendState" to something else.