how to use ? and : expression in java

Question

I want to use ? : expression instead of if with 4 conditions in this code but i dont know how< any answers please?

import java.util.Scanner;
public class Ex13 {
  public static void main(String[] args) {
    Scanner e = new Scanner(System.in);
     int x, y, sum, diff;
     boolean z = false;
     System.out.println("Enter x and y");
     x = e.nextInt();
     y = e.nextInt();
     sum = x+y;
     diff = x-y;
     if(x==15||y==15||sum==15||diff==15){
                        z=true;
                       }
      System.out.println(z);
    }}

i tried using else if else if, and i tried ? : but there was a problem with the lossy conversion from boolean to in types.

Answer 1

I prefer the way you have your if statement right now, but if you really wanted to use a ternary expression, you could try:

z = (x == 15 || y == 15 || sum == 15 || diff == 15) ? true : false;

But appreciate that in your particular code snippet, the assignment value happens to be identical to the boolean expression in the if statement, so you could just use a direct assignment:

z = (x == 15 || y == 15 || sum == 15 || diff == 15);