How do you dynamically create scheduled tasks in Java?

In Java, you can dynamically create scheduled tasks using the ScheduledExecutorService class.

Here is an example code that can help you create a timed task dynamically.

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class DynamicTaskCreation {
    public static void main(String[] args) {
        // 创建一个ScheduledExecutorService对象
        ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
        
        // 创建一个Runnable对象，表示定时执行的任务
        Runnable task = new Runnable() {
            public void run() {
                System.out.println("定时任务执行");
            }
        };
        
        // 使用ScheduledExecutorService的schedule方法创建一个定时任务
        // 该任务将在延迟1秒后执行
        scheduler.schedule(task, 1, TimeUnit.SECONDS);
        
        // 关闭ScheduledExecutorService
        scheduler.shutdown();
    }
}

In the above code, a ScheduledExecutorService object is created by using Executors.newScheduledThreadPool(1), and then a scheduled task is created using the schedule method. The schedule method takes three parameters: a Runnable object representing the task to be executed, a delay time, and a time unit. In the above code, the scheduled task will be executed after a 1-second delay.

Please note that the shutdown method is called to close the ScheduledExecutorService in order to ensure the program can exit properly.