多线程:只要有一个线程结束，就取消其余线程

package com.wangzs.offer;

import lombok.extern.slf4j.Slf4j;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

/**
 * 多线程: 只要有一个处理有结果，就立刻结束其他还在运行中的处理方式
 */
@Slf4j
public class TaskCallable implements Callable {
    // 启动线程数量
    private static final Integer THREAD_NUMS = 10;

    // 线程名字
    String name;

    public TaskCallable(String name, int sleep) {
        this.name = name;
    }

    @Override
    public String call() throws Exception {
        int random = new Random().nextInt(10);
        log.info("[{}]任务开始睡眠[{}]秒", name, random);
        Thread.sleep(random * 1000);
        return name;
    }

    public static void main(String[] args) throws Exception {
        ExecutorService pool = Executors.newFixedThreadPool(50); // 线程池大小
        List> results = new ArrayList<>();
        for (int i = 0; i < THREAD_NUMS; i++) { // 启动线程数量
            results.add(pool.submit(new TaskCallable("the " + i, i)));
        }

        log.info("开始等待处理结果");
        boolean breakAllThread = false;
        while (true) {
            for (Future f : results) {
                if (f.isDone()) {
                    log.info("处理已经有了结果{}", f.get());
                    breakAllThread = true;
                    break;
                }
            }

            if (breakAllThread) { // 取消所有线程
                for (Future f : results) {
                    log.info("取消其他线程.");
                    f.cancel(true);
                }
                break;
            }
        }

        pool.shutdown();
    }
}

D:\MyProgram\Java\jdk1.8.0_341\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2022.2.3\lib\idea_rt.jar=59910:C:\Program Files\JetBrains\IntelliJ IDEA 2022.2.3\bin" -Dfile.encoding=UTF-8 -classpath 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com.wangzs.offer.TaskCallable
09:02:05.085 [pool-1-thread-4] INFO com.wangzs.offer.TaskCallable - [the 3]任务开始睡眠[5]秒
09:02:05.085 [pool-1-thread-5] INFO com.wangzs.offer.TaskCallable - [the 4]任务开始睡眠[1]秒
09:02:05.085 [pool-1-thread-1] INFO com.wangzs.offer.TaskCallable - [the 0]任务开始睡眠[5]秒
09:02:05.085 [pool-1-thread-7] INFO com.wangzs.offer.TaskCallable - [the 6]任务开始睡眠[3]秒
09:02:05.085 [pool-1-thread-2] INFO com.wangzs.offer.TaskCallable - [the 1]任务开始睡眠[7]秒
09:02:05.085 [pool-1-thread-9] INFO com.wangzs.offer.TaskCallable - [the 8]任务开始睡眠[2]秒
09:02:05.085 [pool-1-thread-8] INFO com.wangzs.offer.TaskCallable - [the 7]任务开始睡眠[2]秒
09:02:05.085 [pool-1-thread-10] INFO com.wangzs.offer.TaskCallable - [the 9]任务开始睡眠[4]秒
09:02:05.085 [pool-1-thread-6] INFO com.wangzs.offer.TaskCallable - [the 5]任务开始睡眠[8]秒
09:02:05.085 [main] INFO com.wangzs.offer.TaskCallable - 开始等待处理结果
09:02:05.085 [pool-1-thread-3] INFO com.wangzs.offer.TaskCallable - [the 2]任务开始睡眠[9]秒
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 处理已经有了结果the 4
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 取消其他线程.
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 取消其他线程.
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 取消其他线程.
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 取消其他线程.
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 取消其他线程.
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 取消其他线程.
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 取消其他线程.
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 取消其他线程.
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 取消其他线程.
09:02:06.097 [main] INFO com.wangzs.offer.TaskCallable - 取消其他线程.

Process finished with exit code 0