gs gs128 Java Interfaces Packages - Java Interfaces - Quiz No.1

 interface calculate { void cal(int item); } class display implements calculate { int x; public void cal(int item) { x = item * item; } } class interfaces { public static void main(String args[]) { display arr = new display; arr.x = 0; arr.cal(2); System.out.print(arr.x); } }

 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); } }

 interface calculate { int VAR = 0; void cal(int item); } class display implements calculate { int x; public  void cal(int item) { if (item<2) x = VAR; else x = item * item; } } class interfaces {  public static void main(String args[]) { display[] arr=new display[3];  for(int i=0;i<3;i++) arr[i]=new display(); arr[0].cal(0); arr[1].cal(1); arr[2].cal(2); System.out.print(arr[0].x+" " + arr[1].x + " " + arr[2].x); } }