ExecutorService的invokeAny方法注意

package com.msxf.datasource.thirdpart.service.extface;

import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.*;

public class ThreadTest {

    /**
     * 同一个map里面存储了各个水果的数量，
     *
     * @param args
     */
    public static void main(String[] args) throws ExecutionException, InterruptedException {

        /**
         * invokeAny 3个线程中最快的那个会返回，但是其他的也可能都执行完/也可能不执行；
         */
        testInvokeAny(); 
    }

    private static void testInvokeAny() throws ExecutionException, InterruptedException {
        ExecutorService executorService = Executors.newSingleThreadExecutor();

        Set> tskSet = new HashSet<>();

        tskSet.add(new Callable() {
            public String call() throws Exception {
                System.out.println("Task 1 ..........running.......");
                return "Task 1";
            }
        });
        tskSet.add(new Callable() {
            public String call() throws Exception {
                System.out.println("Task 2 ..........running.......");
                return "Task 2";
            }
        });
        tskSet.add(new Callable() {
            public String call() throws Exception {
                System.out.println("Task 3 ..........running.......");
                return "Task 3";
            }
        });

        String result = executorService.invokeAny(tskSet);

        System.out.println("result = " + result);

        executorService.shutdown();
    }

}

 

 

    invokeAny 3个线程中最快的那个会返回，

   但: 其他的2个也可能都执行完/也可能不执行；