class threadTest implements Runnable
{	
	public static void main(String [] args)
	{
		Thread1 tr1=new Thread1();
	        Thread2 tr2=new Thread2();
		tr1.start();
	        tr2.start();
	        for(int i=0;i<10;i++)
	        {
	                try
	                {
	              	   
	                   Thread.sleep(300);
	                }
	                catch(Exception e)
	                {
	                }
	        }
	}
	public void run()
	{
	}
	
}
class Thread1 extends Thread
{
	public void run()
	{
		
		while(true)
		{
			try
		        {
			System.out.println("I'am a Thread1! I want to Sleep half Minter:");
			Thread1.sleep(500);
             		}
		        catch(Exception e)
		        {
			System.out.println("Wrong Message!");
		        }
		}
	}
}
class Thread2 extends Thread
{
	public void run()
	{
		while(true)
		{
			
		try
		{
			System.out.println("I'am a Thread2! I want to Sleep half Minter:");
			Thread2.sleep(500);
		}
		catch(Exception e)
		{
			System.out.println("Wrong Message!");
		}
	}
	}
}