Comparing int's in java

I have this script to simulate 2 die rolls in java. This is done twice, once by user and once by computer(both automatically). The program outputs the rolls and sums them up. I however cannot get an if/else statement to work to compare the rolls and determine the winner/ or tie. So far I have:

import java.util.Scanner;
import java.util.Random;
import java.text.DecimalFormat;
/*
Program to simulate die roll
*/
public class Dice
{
Scanner scan = new Scanner (System.in);
Random generator= new Random();
int roll1;
int roll2;
int roll3;
int roll4;
int addroll1;
int addroll2;

public void userdieroll() // Simulates users role
{
    roll1 = (generator.nextInt(7) +1); // Generate number from 1-6
    System.out.println("Your first roll is "+roll1+"");// Says users first role
    roll2 = (generator.nextInt(7) +1); // Generate number from 1-6
    System.out.println("Your second roll is "+roll2+"");// Says users second roll
    addroll1=  roll1 +roll2;// Sums users roles
    System.out.println("The sum of your two roles is "+addroll1+" \n");
}
public void compdieroll()// Simulates computers role
{
    roll3 = (generator.nextInt(7) +1); // Generate number from 1-6
    System.out.println("The computers first role is "+roll3+""); // Says computers first role
    roll4 = (generator.nextInt(7) +1); // Generate number from 1-6
    System.out.println("The computers second role is "+roll4+""); // Says computers second role
    addroll2=  roll3 +roll4;// Sums computers roles
    System.out.println("The sum of the computers roles is "+addroll2+""); 
}
public void findwinner()
{
        if (addroll1 == addroll2)
        {
            System.out.println("Its a tie!");
        }
        else
        {   
           if (addroll1 > addroll2)
           {
               System.out.println("You Won!");
           }

           else
           {
               System.out.println("You lost!");
           }

}
}
public static void main(String[] args)
{
    Dice userroll = new Dice();
    userroll.userdieroll();
    Dice comproll = new Dice();
    comproll.compdieroll();
    Dice looper = new Dice();
    looper.findwinner();

}

}