Learning java, need explanation on error I am getting

Question

Its the code
package Operators;

import java.util.Scanner;

public class OperatorsExample1 {
public void hmm(){
Scanner sc=new Scanner(System.in);
int x,y,z;
System.out.println("Enter the value of x");
sc.nextInt();
System.out.println("Enter the value of y");
sc.nextInt();
z=x+y; //getting error here
System.out.println("The value z");
sc.nextInt();
}

public static void main(String[] args) {
// TODO Auto-generated method stub
OperatorsExample1 oo= new OperatorsExample1();
oo.hmm();
}

}

Answer 1

One error is that you should write:
x = sc.nextInt()
and y = sc.nextInt();
And then another error comes that I dont know :p