JDK5 | 隔叶黄莺 Yanbin Blog - 软件编程实践

2013-04-11 | 阅读(995)

被问及 Java 多线程，多会想到 Thread, Runnable，更通常是用 new Thread(){public void run(){...}}.start() 来启动一个线程。那都是 JDK 1.5 之前的年代了，现在还这么回答就 Out 了。用用 JDK 1.5 给我们带来的 java.util.concurrent 吧，更酷了。这里不涉及它的并发集合类，同步互斥机制，只说线程及线程池的应用举例。

1. 新的启动线程的方式：

public static void main(String[] args) throws Exception {
    Callable<Integer> callable = new Callable<Integer>() {
        public Integer call() throws Exception {
            System.out.println("callable executed.");
            return new Random().nextInt(100);
        }
    };
    
    FutureTask<Integer> future = new FutureTask<Integer>(callable);
    new Thread(future).start();
    
    System.out.println("do your things here");
    
    System.out.println(future.get());
}

public static void main(String[] args) throws Exception {

Callable<Integer> callable = new Callable<Integer>() {

public Integer call() throws Exception {

System.out.println("callable executed.");

return new Random().nextInt(100);

}

};

FutureTask<Integer> future = new FutureTask<Integer>(callable);

new Thread(future).start();

System.out.println("do your things here");

System.out.println(future.get());

}

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Tag: JDK5

使用 JDK 5 后的线程并发，Callable, Future, ExecutorServie ...