我希望每小时运行一次功能,向用户发送每小时的进度截图。我在一个名为sendScreenshot()
的函数中进行代码设置如何在后台运行此计时器,每小时调用sendScreenshot()函数,而程序的其余部分正在运行?
这是我的代码:
public int onLoop() throws Exception{
if(getLocalPlayer().getHealth() == 0){
playerHasDied();
}
return Calculations.random(200, 300);
}
public void sendScreenShot() throws Exception{
Robot robot = new Robot();
BufferedImage screenshot = robot.createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()));
screenshotNumber = getNewestScreenshot();
fileName = new File("C:/Users/%username%/Dreambot/Screenshots/Screenshot" + screenshotNumber +".");
ImageIO.write(screenshot, "JPEG", fileName);
mail.setSubject("Your hourly progress on account " + accName);
mail.setBody("Here is your hourly progress report on account " + accName +". Progress is attached in this mail.");
mail.addAttachment(fileName.toString());
mail.setTo(reciepents);
mail.send();
}
答案 0 :(得分:16)
ScheduledExecutorService ses = Executors.newSingleThreadScheduledExecutor();
ses.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
sendScreenShot();
}
}, 0, 1, TimeUnit.HOURS);
首选使用ScheduledExecutorService
而不是Timer
:
Java Timer vs ExecutorService?
答案 1 :(得分:1)
根据this article by Oracle,也可以使用@Schedule
注释:
@Schedule(hour = "*")
public void doSomething() {
System.out.println("hello world");
}
例如,秒和分钟的值可以是0-59,小时0-23,月份1-12。
此处还介绍了其他选项。
答案 2 :(得分:0)
java的Timer
在这里工作正常。
http://docs.oracle.com/javase/6/docs/api/java/util/Timer.html
Timer t = new Timer();
t.scheduleAtFixedRate(new TimerTask() {
public void run() {
// ...
}
}, delay, 1 * 3600 * 1000); // 1 hour between calls
答案 3 :(得分:0)
对于这种类型的周期执行(意味着每天或每小时),您需要使用的是这样的Timer:
public static void main(String[] args) throws InterruptedException {
Calendar today = Calendar.getInstance();
today.set(Calendar.HOUR_OF_DAY, 7);
today.set(Calendar.MINUTE, 45);
today.set(Calendar.SECOND, 0);
Timer timer = new Timer();
TimerTask task = new TimerTask() {
@Override
public void run() {
System.out.println("I am the timer");
}
};
// timer.schedule(task, today.getTime(), TimeUnit.MILLISECONDS.convert(1, TimeUnit.DAYS)); // period: 1 day
timer.schedule(task, today.getTime(), TimeUnit.MILLISECONDS.convert(5, TimeUnit.SECONDS)); // period: 5 seconds
}
该示例将从当前日期和上午7:45起每5秒执行一次时间任务。 祝你好运。