1. Thread ??? ??

public class ThreadCreator extends Thread{

    public static void main(String[] args) {
       //第一種方式：
       ThreadCreator creator = new ThreadCreator();
       Thread thread = new Thread(creator,"線程1");
       thread.start();
       //第二種方式：
       Thread thread = new ThreadCreator();
       thread.start();
       //第三種方式：
       new ThreadCreator().start();
　　　}
 
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName() + "run");
    }
}

2. Runnable ????? ??

(?? ?? ??? ???? ??: java ??? ????)

public class ThreadCreator implements Runnable{

    public static void main(String[] args) {
       ThreadCreator creator = new ThreadCreator();
       Thread thread = new Thread(creator,"線程1");
       thread.start();
    }

    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName() + "run");
    }
}

3. ExecutorService

public class ThreadCreator implements Callable<Integer> {

    public static void main(String[] args) throws ExecutionException, InterruptedException {
       ThreadCreator creator = new ThreadCreator();
       FutureTask futureTask = new FutureTask(creator);
       Thread thread = new Thread(futureTask,"線程");
       thread.start();
       System.out.println(futureTask.get());
    }

    @Override
    public Integer call() {
        return 1024;
    }
}

??? ??? ??? ??? ???:

(1) ???? ?? ??? ????. ??? ?? ??? ??? ???? ??? ?? ??? ??? ?????.

(2) ?? ?: ???? ?? ?? ????. ??? ???? ?? ????? ?? ??? ????? ? ????. Submit?? ?? ?? ??? ??? ???? ? ???? Future ?? ?? ?? ????. get() ???? ?? ?????.

??? ? ?? ???? ??? ????? ???? ?? ???? ?? ???? ????? ?? ?? ??? ?? ??? ??? ??????.

public class ThreadCreator{

   static ExecutorService service = Executors.newFixedThreadPool(5);

    public static void main(String[] args) throws ExecutionException, InterruptedException {
        //execute無返回值
        service.execute(new ThreadTask(1,"1"));
        //submit有返回值
        Future<Integer> result = service.submit(new ThreadTaskCall());
        System.out.println(result.get());
        service.shutdownNow();
    }
    static class ThreadTask implements Runnable{
        private int param1;
        private String param2;
        public ThreadTask(int param3,String param4){
            this.param1 = param3;
            this.param2 = param4;
        }
        @Override
        public void run() {
            System.out.println(param1+param2);
        }
    }

    static class ThreadTaskCall implements Callable<Integer>{
        @Override
        public Integer call() throws Exception {
            return 1024;
        }
    }
}

?? Spring? ?? ??? ??? ?????. ?? ??? ??????.

5. ?? ?? ???

public void run() {
        if (state != NEW ||
            !UNSAFE.compareAndSwapObject(this, runnerOffset,
                                         null, Thread.currentThread()))
            return;
        try {
            Callable<V> c = callable;
            if (c != null && state == NEW) {
                V result;
                boolean ran;
                try {
                    result = c.call();
                    ran = true;
                } catch (Throwable ex) {
                    result = null;
                    ran = false;
                    setException(ex);
                }
                if (ran)
                    set(result);
            }
        } finally {
            runner = null;
            int s = state;
            if (s >= INTERRUPTING)
                handlePossibleCancellationInterrupt(s);
        }
    }
protected void setException(Throwable t) {
        if (UNSAFE.compareAndSwapInt(this, stateOffset, NEW, COMPLETING)) {
            outcome = t;
            UNSAFE.putOrderedInt(this, stateOffset, EXCEPTIONAL); // final state
            finishCompletion();
        }
    }

lambda ??? ?:

public class ThreadCreator {

    public static void main(String[] args) {

        //繼承Thread類
        new Thread() {
            @Override
            public void run() {
                System.out.println("extends Thread Class!");
            }
        }.start();
        //實(shí)現(xiàn)Runnable接口
        new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println("implement Runnable!");
            }
        }).start();
        //實(shí)現(xiàn)Callable接口
        new Thread(new FutureTask<Integer>(new Callable() {
            @Override
            public Integer call() throws Exception {
                return 1024;
            }
        })).start();
        //lambda表達(dá)式
        new Thread(() -> System.out.println("execute single code")).start();
        new Thread(() -> {
            System.out.println("execute multiple code");
        }).start();
    }
}

?? ?? ?? ????:

? ??? Java?? ???? ???? ?? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!