JAVA_多线程的实现方式

线程的状态

方式一：

public class Thread1 extends Thread {
    @Override
    public void run() {
        synchronized (this) {
            for (int i = 0; i < 100; i++) {
                System.out.println(getName() + "===" + i);
            }
        }
    }
}

Thread1 thread1 = new Thread1();
thread1.start();

方式二：

public class MyRunnable implements Runnable {
    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            System.out.println(i);
        }
    }
}

MyRunnable myRunnable = new MyRunnable();
new Thread(myRunnable).start();

使用这个构造函数来完成

​​​​​​​public Thread(Runnable var1) {
    this.init((ThreadGroup)null, var1, "Thread-" + nextThreadNum(), 0L);
}

方式三：

public class MyCallable implements Callable {
    private int sum;

    @Override
    public Integer call() throws Exception {

        for (int i = 0; i < 100; i++) {
            System.out.println(i);
            sum += i;
        }
        return sum;
    }
}

        MyCallable myCallable = new MyCallable();
        FutureTask futureTask = new FutureTask(myCallable);
        new Thread(futureTask).start();

        try {
            Integer o = futureTask.get();
            System.out.println(o);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }

使用该构造函数完成

       public FutureTask(Callable var1) {
        if (var1 == null) {
            throw new NullPointerException();
        } else {
            this.callable = var1;
            this.state = 0;
        }
    } 



      public Thread(Runnable var1) {
        this.init((ThreadGroup)null, var1, "Thread-" + nextThreadNum(), 0L);
    }

方式四：

后续补充。。。