class Test {public static void main(String[] args) {System.out.println("当前线程："+Thread.currentThread());new TestThread().start();new TestThread().start();}static class TestThread extends Thread {@Overridepublic void run() {System.out.println("当前线程："+Thread.currentThread());}}
}/**运行结果：当前线程：Thread[main,5,main]当前线程：Thread[Thread-0,5,main]当前线程：Thread[Thread-1,5,main]*/

class Test {public static void main(String[] args) {System.out.println("当前线程："+Thread.currentThread());new Thread(new TestThread()).start();new Thread(new TestThread()).start();}static class TestThread implements Runnable {@Overridepublic void run() {System.out.println("当前线程："+Thread.currentThread());}}
}/**
运行结果：当前线程：Thread[main,5,main]当前线程：Thread[Thread-0,5,main]当前线程：Thread[Thread-1,5,main]*/

public interface Callable<V> {V call() throws Exception;
}

public interface Future<V> {boolean cancel(boolean mayInterruptIfRunning);boolean isCancelled();boolean isDone();V get() throws InterruptedException, ExecutionException;V get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException;
}

public interface RunnableFuture<V> extends Runnable, Future<V> {void run();
}

public class TestCallable {public static void main(String[] args) {System.out.println("start");//执行任务FutureTask<String> task = new FutureTask<String>(new Callable<String>() {@Overridepublic String call() throws Exception {Thread.sleep(1000);return "success";}});new Thread(task).start();//接收线程运算后的结果try {long start = System.currentTimeMillis();System.out.println("任务执行结果:" + task.get());//get为阻塞方法，阻塞至任务执行结束long end = System.currentTimeMillis();long process = end - start;System.out.println("任务执行了:" + process + "毫秒");} catch (InterruptedException | ExecutionException e) {e.printStackTrace();}System.out.println("end");}
}/**运行结果：start任务执行结果:success任务执行了:1018毫秒end*/