class Example
{
	int x = 10; 
	int y = 20; 

	void m1(Example e)
	{
	  e.x = 50;
	  e.y = 60;
	 
	  e = null;
	}
	
	public static void main(String[] args)
	{
		Example e1 = new Example();	
		Example e2 = new Example();

		e1.m1(e2);
1.		
		Example e3 = e1;
2.		
		e1 = null;
3.		
		new Example();
4.		
		e2 = new Example();
5.		
		
	}

}