当我使用ThreadPool时，程序在完成后等待关闭

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

public class ThreadPoolExample {
    public static void main(String[] args) {
        // 创建一个固定大小的线程池
        ExecutorService executorService = Executors.newFixedThreadPool(5);

        // 提交任务
        for (int i = 0; i < 10; i++) {
            final int taskNumber = i;
            executorService.submit(() -> {
                System.out.println("Task " + taskNumber + " is running on thread " + Thread.currentThread().getName());
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                }
                System.out.println("Task " + taskNumber + " is completed");
            });
        }

        // 关闭线程池
        executorService.shutdown();
        try {
            // 等待所有任务完成，最多等待10秒
            if (!executorService.awaitTermination(10, TimeUnit.SECONDS)) {
                // 如果超时，强制关闭
                executorService.shutdownNow();
            }
        } catch (InterruptedException e) {
            // 如果等待过程中被中断，强制关闭
            executorService.shutdownNow();
        }

        System.out.println("Main thread exiting");
    }
}