There are several ways to implement java timer

The implementation methods are: 1. Timer and TimerTask classes: are classes provided by Java for scheduled execution of tasks. You can create a Timer object and then schedule the TimerTask object to execute the task; 2. ScheduledExecutorService interface: It is an interface provided by Java for scheduling tasks, located in the java.util.concurrent package. It provides more powerful and flexible timer functions; 3. Quartz framework and so on.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

In Java, there are many ways to implement the timer function. The following are several common implementation methods:

1. Timer and TimerTask classes:

Timer and TimerTask are classes provided by Java for scheduled execution of tasks. You can create a Timer object and then schedule a TimerTask object to perform tasks.

Sample code:

import java.util.Timer;
import java.util.TimerTask;
public class MyTask extends TimerTask {
    public void run() {
        // 执行定时任务的逻辑
        System.out.println("Task executed!");
    }
}
public class TimerExample {
    public static void main(String[] args) {
        Timer timer = new Timer();
        timer.schedule(new MyTask(), 1000, 2000); // 延迟1秒后开始执行任务，每隔2秒执行一次
    }
}

2. ScheduledExecutorService interface:

ScheduledExecutorService is an interface provided by Java for scheduling tasks, located in java.util. in the concurrent package. It provides more powerful and flexible timer functions.

Sample code:

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
public class ScheduledExecutorExample {
    public static void main(String[] args) {
        ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);
        executor.scheduleAtFixedRate(() -> {
            // 执行定时任务的逻辑
            System.out.println("Task executed!");
        }, 1, 2, TimeUnit.SECONDS); // 延迟1秒后开始执行任务，每隔2秒执行一次
    }
}

3. Quartz framework:

Quartz is a powerful open source scheduling framework that can be used to implement complex scheduled tasks. Scheduling. It supports flexible timing strategies and task management.

The sample code is slightly complex and requires the introduction of Quartz related dependencies and the configuration of Quartz tasks.

Choose how the timer is implemented depends on the needs and complexity of the project. For simple scheduled tasks, Timer and ScheduledExecutorService are good choices; for complex task scheduling, using the Quartz framework can provide more functions and flexibility.

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