使用线程同时运行两个独立的任务

new Thread(new Runnable() {    public void run() {        System.out.println("Look ma, no hands");    }}).start();new Thread(new Runnable() {    public void run() {        System.out.println("Look at me, look at me...");    }}).start();

效果很好…

我更喜欢个人使用ExecutorService。

使用ExecutorService示例进行了更新

所以我写了这个非常简单的例子…

基本上，它使用

ExecutorService

public static void main(String[] args) throws InterruptedException {    ExecutorService service = Executors.newFixedThreadPool(2);    service.submit(new PathScanner());    service.submit(new Counter());    service.shutdown();    service.awaitTermination(1, TimeUnit.DAYS);    System.exit(0);}public static class PathScanner implements Callable<Object> {    @Override    public Object call() throws Exception {        scan(new File("C:/"), 0);        return null;    }    protected void scan(File path, int deepth) {        if (deepth < 15) { System.out.println("Scanning " + path + " at a deepth of " + deepth); File[] files = path.listFiles(); for (File file : files) {     if (file.isDirectory()) {         scan(file, ++deepth);     } }        }    }}public static class Counter implements Callable<Object> {    @Override    public Object call() throws Exception {        for (int index = 0; index < 1000; index++) { Thread.sleep(1); System.out.println(index);        }        return null;    }}

运行…

现在更改

ExecutorService service =Executors.newFixedThreadPool(2);

ExecutorService service =Executors.newFixedThreadPool(1);

这是控制执行者在处理队列时可以同时使用的线程数的方法。

组成更多任务，然后将它们添加到队列中，看看会得到什么。