如何用Java編寫一個(gè)定時(shí)開關(guān)機(jī)軟件？（pc版）

定時(shí)開機(jī)是BIOS設(shè)置的。

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定時(shí)關(guān)機(jī)這個(gè)好寫。。。。

啟動(dòng)時(shí)檢測(cè)一次當(dāng)前時(shí)間，算出距離目標(biāo)時(shí)間的值。

然后線程休眠這么長(zhǎng)時(shí)間。

然后執(zhí)行控制臺(tái)命令，調(diào)用windows系統(tǒng)自帶的關(guān)機(jī)命令就可以了。

java調(diào)用控制臺(tái)的關(guān)機(jī)命令如下

Runtime.getRuntime().exec("shutdown -s");

lang包下的，直接可以用~

系統(tǒng)是winXP+JVM1.5

java定時(shí)關(guān)機(jī)問題

以下是給你修改過的 ，還加了一個(gè)取消功能，看看。

import java.awt.*;

import java.awt.event.*;

import java.awt.geom.*;

import java.util.*;

import javax.swing.*;

public class ClockFrame extends JFrame {

private JComboBox hourBox, minuteBox, secondBox;

private int hour, minute, second, totalSeconds, currentSeconds;

private long argue;

private GregorianCalendar calendar;

private boolean change = true;

private static final int WIDTH = 200;

private static final int HEIGHT = 150;

public ClockFrame() {

setTitle("關(guān)機(jī)定時(shí)");

setSize(200, 150);

Container contentPanel = getContentPane();

JPanel timePanel = new JPanel();

timePanel.setLayout(new GridLayout(4, 2));

JLabel minuteLable = new JLabel("設(shè)置分鐘");

timePanel.add(minuteLable);

minuteBox = new JComboBox();

timePanel.add(minuteBox);

for (int i = 0; i 60; i++) {

minuteBox.addItem(i);

}

minuteBox.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent evt) {

minute = ((Integer) minuteBox.getSelectedItem()).intValue();

}

});

JLabel secondLable = new JLabel("設(shè)置秒鐘");

timePanel.add(secondLable);

secondBox = new JComboBox();

timePanel.add(secondBox);

for (int i = 0; i 60; i++) {

secondBox.addItem(i);

}

secondBox.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent evt) {

second = ((Integer) secondBox.getSelectedItem()).intValue();

}

});

contentPanel.add(timePanel, BorderLayout.CENTER);

JButton check = new JButton("確定");

contentPanel.add(check, BorderLayout.SOUTH);

check.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent evt) {

JButton check=(JButton) evt.getSource();

if (check.getText().equals("確定")) {

calendar = new GregorianCalendar();

int currentSeconds = calendar.get(Calendar.HOUR_OF_DAY)

* 3600 + calendar.get(Calendar.MINUTE) * 60

+ calendar.get(Calendar.SECOND);

totalSeconds = hour * 3600 + minute * 60 + second;

if (totalSeconds - currentSeconds = 0) {

argue = (totalSeconds - currentSeconds) * 1000;

JOptionPane.showMessageDialog(ClockFrame.this,

"您設(shè)置的時(shí)間為 " + hour + ":" + minute + ":" + second

+ "\n程序?qū)⒃诤笈_(tái)運(yùn)行，并在此時(shí)自動(dòng)關(guān)閉計(jì)算機(jī)！", "設(shè)置成功",

JOptionPane.INFORMATION_MESSAGE);

hideFrame();

}

try {

// Thread.sleep(argue);//這句沒用

Runtime.getRuntime().exec(

"shutdown.exe -s -c \"我要關(guān)機(jī)了噢！不好意思！\" -t "

+ totalSeconds);

check.setText("取消");

} catch (Exception e) {

e.printStackTrace();

}

}else{

try {

Runtime.getRuntime().exec("shutdown.exe -a");

check.setText("確定");

} catch (Exception e) {

e.printStackTrace();

}

}

}

});

}

private void hideFrame() {

this.setVisible(false);

}

public static void main(String[] args) {

JFrame frame = new ClockFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setLocationByPlatform(true);

frame.show();

}

}

有沒有讓手機(jī)關(guān)機(jī)的代碼？

手機(jī)關(guān)機(jī)代碼：

In?frameworks/base/services/java/com/android/server/BatteryService。

Intent?intent?=?new?Intent(Intent。ACTION_REQUEST_SHUTDOWN)；

intent。putExtra(Intent。EXTRA_KEY_CONFIRM，?false)；

intent。setFlags(Intent。FLAG_ACTIVITY_NEW_TASK)；

mContext。startActivity(intent)；

手機(jī)充電的預(yù)防措施：

給手機(jī)充電的最好方式是一有機(jī)會(huì)就充電，每次充一點(diǎn)電。哪怕只是幾分鐘也行，零星時(shí)間充電不會(huì)損害電池。

不要等電池電量完全耗盡后再給手機(jī)充電。所謂的深度放電即等電池電量幾乎耗盡時(shí)再給它充電對(duì)電池?fù)p耗極大。

手機(jī)電池一邊輸入，一邊輸出，不僅會(huì)耗雙倍的電，對(duì)電池性能造成損壞，嚴(yán)重的甚至可能會(huì)導(dǎo)致手機(jī)爆炸。