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 = ; i < ; ++i)

        {

            try

            {

                Thread.sleep((long) Math.random() * );

            }

            catch (InterruptedException e)

            {

                e.printStackTrace();

            }

            System.out.println("Hello: " + i);

        }

    }

    public synchronized void execute2()

    {

        for (int i = ; i < ; ++i)

        {

            try

            {

                Thread.sleep((long) Math.random() * );

            }

            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();

    }

}