package com.ljq.test.thread;
 
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
 
public class CallableFutureTest {
    @SuppressWarnings("unchecked
 
")
    public static void main(String[] args) throws ExecutionException,
            InterruptedException {
        CallableFutureTest test = new CallableFutureTest();
 
        // 建立一個執行緒池
        ExecutorService pool = Executors.newFixedThreadPool(2);
        // 建立兩個有返回值的任務
        Callable c1 = test.new
 
 MyCallable("A");
        Callable c2 = test.new MyCallable("B");
 
        // 執行任務並獲取Future物件
        Future f1 = pool.submit(c1);
        Future f2 = pool.submit(c2);
 
        // 從Future物件上獲取任務的返回值，並輸出到控制檯
        System.out.println(">>>" + f1.get().toString());
        System.out.println(">>>
 
" + f2.get().toString());
 
        // 關閉執行緒池
        pool.shutdown();
    }
 
    @SuppressWarnings("unchecked")
    class MyCallable implements Callable {
        private String name;
 
        MyCallable(String name) {
            this.name = name;
        }
 
        public Object call() throws Exception {
            return name + "任務返回的內容";
        }
    }
}

>>>A任務返回的內容
>>>B任務返回的內容