interface calculate { void cal(int item); } class displayA implements calculate { int x; public void cal(int item) { x = item * item; } } class displayB implements calculate { int x; public void cal(int item) { x = item / item; } } class interfaces { public static void main(String args[]) { displayA arr1 = new displayA; displayB arr2 = new displayB; arr1.x = 0; arr2.x = 0; arr1.cal(2); arr2.cal(2); System.out.print(arr1.x + " " + arr2.x); } }
a) 0 0
b) 2 2
c) 4 1
d) 1 4
c
Explanation: class displayA implements the interface calculate by doubling the value of item, where as class displayB implements the interface by dividing item by item, therefore variable x of class displayA stores 4 and variable x of class displayB stores 1.
Output:
$ javac interfaces.java
$ java interfaces
4 1