User:Rajat dixit

communication between two classes when ever a two different class wants to be communication between each other then object creation is requird.. the object is created by two different wait..... class circle { int r=4;float; int area=0; public void circle area { area=pi*r*r; System.out.print("these of circle="+area); } }
 * by direct memory allocation..........
 * by refrance ........