是否可以在executor服务的所有线程都在处理任务时等待主线程

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

public class Main {
    public static void main(String[] args) throws InterruptedException {
        ExecutorService executor = Executors.newFixedThreadPool(5);

        // 提交任务到线程池
        for (int i = 0; i < 10; i++) {
            final int taskNumber = i;
            executor.submit(() -> {
                System.out.println("Task " + taskNumber + " is running on thread " + Thread.currentThread().getName());
                try {
                    TimeUnit.SECONDS.sleep(2); // 模拟任务执行时间
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                }
                System.out.println("Task " + taskNumber + " is completed");
            });
        }

        // 关闭线程池并等待所有任务完成
        executor.shutdown();
        if (!executor.awaitTermination(60, TimeUnit.SECONDS)) {
            System.out.println("Not all tasks were completed within the timeout period.");
        } else {
            System.out.println("All tasks have been completed.");
        }
    }
}