interface named num with two functions int add (int x, int y) and int diff(int x, int y) then make a class the implements that.

Answer 1

Homework: dislike ^^

Answer 2

What is your actual question?

Answer 3

This seems like an incomplete question. I've come across a similar question, that is " Make an interface named num with two functions int add(int x, int y) and int diff(int x, int y) then make a class that implements that interface num. ".

Here is the solution for this:

interface num {
int add(int x, int y);
int diff(int x, int y);
}

class InterfaceByKalash implements num {
int sum;
int sub;

public int add(int x, int y) {
sum = x+y;
System.out.println("The sum is = " +sum);
return sum;
}

public int diff(int x, int y) {
sub = x-y;
System.out.println("The difference is = " +sub);
return sub;
}

public static void main(String[] args) {
Interface2015 obj = new Interface2015();
obj.add(2, 4);
obj.diff(2, 4);
}

}