每小时运行一次java函数 [英] Run java function every hour

问题描述

我想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。

I want to run a function every hour, to email users a hourly screenshot of their progress. I code set up to do so in a function called sendScreenshot()

如何在后台运行此计时器以每小时调用函数sendScreenshot（），而程序的其余部分正在运行？

How can I run this timer in the background to call the function sendScreenshot() every hour, while the rest of the program is running?

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();

}

推荐答案

使用 ScheduledExecutorService ：

ScheduledExecutorService ses = Executors.newSingleThreadScheduledExecutor();
ses.scheduleAtFixedRate(new Runnable() {
    @Override
    public void run() {
        sendScreenShot();
    }
}, 0, 1, TimeUnit.HOURS);

首选使用 ScheduledExecutorService 而不是计时器：
Java Timer vs ExecutorService？

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