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Spring Framework - ThreadPoolTaskSchedulerExample Examples

[Last Updated: Oct 30, 2025]

Spring Framework 

package com.logicbig.example;

import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;

import java.time.LocalTime;

public class ThreadPoolTaskSchedulerExample {
    public static void main(String[] args) throws InterruptedException {
        ThreadPoolTaskScheduler s = new ThreadPoolTaskScheduler();
        s.setPoolSize(5);
        s.initialize();
        for (int i = 0; i < 2; i++) {
            int finalI = i;
            s.scheduleAtFixedRate(
                    () -> System.out.printf("Task: %s, Thread: %s, Time: %s%n",
                            finalI,
                            Thread.currentThread().getName(),
                            LocalTime.now()), 1000);
        }
        Thread.sleep(10000);
        //shutting down after 10 sec
        s.getScheduledThreadPoolExecutor().shutdownNow();
    }
}

Output

Task: 0, Thread: ThreadPoolTaskScheduler-2, Time: 16:06:59.036757200
Task: 1, Thread: ThreadPoolTaskScheduler-1, Time: 16:06:59.036757200
Task: 0, Thread: ThreadPoolTaskScheduler-2, Time: 16:07:00.038610
Task: 1, Thread: ThreadPoolTaskScheduler-3, Time: 16:07:00.038610
Task: 0, Thread: ThreadPoolTaskScheduler-1, Time: 16:07:01.034358700
Task: 1, Thread: ThreadPoolTaskScheduler-4, Time: 16:07:01.050179300
Task: 0, Thread: ThreadPoolTaskScheduler-2, Time: 16:07:02.043377800
Task: 1, Thread: ThreadPoolTaskScheduler-3, Time: 16:07:02.043377800
Task: 0, Thread: ThreadPoolTaskScheduler-2, Time: 16:07:03.035622200
Task: 1, Thread: ThreadPoolTaskScheduler-1, Time: 16:07:03.051666600
Task: 0, Thread: ThreadPoolTaskScheduler-4, Time: 16:07:04.048542900
Task: 1, Thread: ThreadPoolTaskScheduler-5, Time: 16:07:04.048542900
Task: 0, Thread: ThreadPoolTaskScheduler-4, Time: 16:07:05.035118300
Task: 1, Thread: ThreadPoolTaskScheduler-2, Time: 16:07:05.050567100
Task: 0, Thread: ThreadPoolTaskScheduler-1, Time: 16:07:06.044956900
Task: 1, Thread: ThreadPoolTaskScheduler-3, Time: 16:07:06.044956900
Task: 1, Thread: ThreadPoolTaskScheduler-4, Time: 16:07:07.039266500
Task: 0, Thread: ThreadPoolTaskScheduler-1, Time: 16:07:07.039266500
Task: 0, Thread: ThreadPoolTaskScheduler-1, Time: 16:07:08.034811600
Task: 1, Thread: ThreadPoolTaskScheduler-3, Time: 16:07:08.050267
Task: 0, Thread: ThreadPoolTaskScheduler-4, Time: 16:07:09.048286800
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