java - 每小时运行一次java函数

Question

我想每小时运行一个函数，通过电子邮件向用户发送他们进度的每小时屏幕截图。我在一个名为 sendScreenshot() 的函数中设置了这样做的代码

我如何在后台运行此计时器以每小时调用函数 sendScreenshot()，同时程序的其余部分仍在运行？

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();

}

Answer 1

使用 ScheduledExecutorService :

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

优先使用 ScheduledExecutorService 而不是 Timer: Java Timer vs ExecutorService?