Producer-Consumer problem with Threads

Even.java

class Even extends Thread
{
	Holder h;
	
	Even(Holder h)
	{
		this.h = h;
	}
	
	public void run()
	{
		while(true)
		{
			synchronized (h)
			{
				h.i++;
				System.out.println(getName() + " " + h.i);
				try 
				{
					Thread.sleep(1000);
					h.notify();
					h.wait();
				} 
				catch (InterruptedException e) 
				{
					e.printStackTrace();
				}
			}
		}
	}
}

Holder.java

class Holder
{
	int i;
}

Odd.java

class Odd extends Thread
{
	Holder h;
	
	Odd(Holder h)
	{
		this.h = h;
	}
	
	public void run()
	{
		while(true)
		{
			synchronized (h)
			{
				h.i++;
				System.out.println(getName() + " " + h.i);
				try 
				{
					h.notify();
					h.wait();
				} 
				catch (InterruptedException e)
				{
					e.printStackTrace();
				}
			}
		}
	}
}

OddEvenProducerConsumerThread.java

public class OddEvenProducerConsumerThread
{
	public static void main(String[] args) throws InterruptedException 
	{
		Holder h = new Holder();
		Thread o = new Odd(h);
		Thread e = new Even(h);
		o.setName("Odd");
		e.setName("Even");
		
		o.start();
		Thread.sleep(200); // give o time to start and enter into waiting state
		e.start();
	}
}