JAVA 线程同步异步简单实例

package test;

public class testThread
{
    public static void main(String[] args)
    {
        Example example = new Example();
        Example example2 = new Example();
        Thread1 thread1 = new Thread1(example);
        Thread1 thread2 = new Thread1(example2);
        thread1.start();
        thread2.start();
        
//        Example example = new Example();
//        Thread2 thread1 = new Thread2(example);
//        Thread2 thread2 = new Thread2(example);
//        thread1.start();
//        thread2.start();
    }

}



class Example
{
    public void execute()
    {
        for (int i = 0; i < 10; ++i)
        {
            try
            {
                Thread.sleep((long) Math.random() * 1000);
            }
            catch (InterruptedException e)
            {
                e.printStackTrace();
            }
            System.out.println("Hello: " + i);
        }
    }

    public synchronized void execute2()
    {
        for (int i = 0; i < 10; ++i)
        {
            try
            {
                Thread.sleep((long) Math.random() * 1000);
            }
            catch (InterruptedException e)
            {
                e.printStackTrace();
            }
            System.out.println("World: " + i);
        }
    }

}

class Thread1 extends Thread
{
    private Example example;

    public Thread1(Example example)
    {
        this.example = example;
    }

    @Override
    public void run()
    {
        example.execute();
    }

}

class Thread2 extends Thread
{
    private Example example;

    public Thread2(Example example)
    {
        this.example = example;
    }

    @Override
    public void run()
    {
        example.execute2();
    }

}