public class SimpleThread
{
    public static void main(String[] args)
    {
        Thread thread1 = new Thread()
        {
            public void run()
            {
                int i = 0;
                while (i < 10)
                {
                    System.out.println(++i);
                    try
                    {
                        sleep(100);
                    }
                    catch (InterruptedException ie)
                    {
                    }
                }
            }
        };
        Thread thread2 = new Thread()
        {
            public void run()
            {
                int i = 0;
                while (i < 10)
                {
                    System.out.println(++i + 10);
                    try
                    {
                        sleep(100);
                    }
                    catch (InterruptedException ie)
                    {
                    }
                }
            }
        };
        thread1.start();
        thread2.start();
    }
}