Input
Output
public class Aggregation { public static void main(String args[]) { A c=new A(7,9); } } class Calculate { int rectangle(int n,int m) { return n*m; } } class A { int rect; A(int length,int breadth) { //aggregation Calculate ca; ca=new Calculate(); rect=ca.rectangle(length,breadth); System.out.println("Area of Rectangle: "+rect); } }