Multithreading

class odd extends Thread
{
    public void run()
    {
        try
        {
            for(int i =1; i<=20;i+=2)
            {
                System.out.println(i);
                Thread.sleep(200);
            }
        }
        catch (InterruptedException e)
        {
            assert false;
        }


    }
}

class even extends Thread
{
    public void run()
    {
        try
        {
            for(int i =2; i<=20;i+=2)
            {
                System.out.println(i);
                Thread.sleep(200);
            }
        }
        catch (InterruptedException e)
        {
            assert false;
        }
    }
}

class multi
{
    public static void main(String[] args)
    {
        odd o= new odd();
        even e= new even();
        o.start();
        e.start();

    }
}