要获取线程池中任务的返回值，可以使用submit()方法返回的Future对象。你可以通过调用Future对象的get()方法来获取任务的返回值。以下是修改后的示例：

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import java.util.concurrent.ArrayBlockingQueue; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit;   public class Main {     public static void main(String[] args) {         // 设置线程池参数         int corePoolSize = 5; // 核心线程数         int maxPoolSize = 10; // 最大线程数         long keepAliveTime = 60; // 线程空闲时间         TimeUnit unit = TimeUnit.SECONDS; // 空闲时间单位         ArrayBlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(10); // 任务队列，这里使用有界队列           // 创建线程池         ThreadPoolExecutor executor = new ThreadPoolExecutor(corePoolSize, maxPoolSize, keepAliveTime, unit, workQueue);           // 提交任务给线程池         for (int i = 0; i < 10; i++) {             final int taskId = i;             executor.submit(() -> {                 System.out.println("Task-" + taskId + " is running");                 try {                     Thread.sleep(2000); // 模拟任务执行                 } catch (InterruptedException e) {                     e.printStackTrace();                 }                 System.out.println("Task-" + taskId + " is finished");             });         }           // 关闭线程池         executor.shutdown();     } }