Thread: Java int comparison

I'm trying to see if the user input is an int but the error I'm getting is int cannot be a deference could someone explain to me what does that mean? Thanks

import java.util.Scanner;
 
public class FibonacciNumbersTester
{
    public static void main(String[]args)
    {   //Variables
        Scanner userNum = new Scanner(System.in);
        Scanner userDed = new Scanner(System.in);
        String userChoice = "Y";
        FibonacciNumbers reMethod  = new FibonacciNumbers();
        while(userChoice.equalsIgnoreCase("Y"))
        {
        System.out.print("What integer would you like to calculate the Fibonacci number for? ");
        int NumTo  = userNum.nextInt();
        if(NumTo.hasNextInt())
        {
            System.out.println("Please enter an integer!");
        }
        int fiboPrint = reMethod.numFibo(NumTo);
        reMethod.printData(fiboPrint);
 
        System.out.print("Would you like to continue? (Y/N)");
        userChoice = userDed.next();
        }
        }
    }

You're trying to call a method off of an int variable which doesn't make sense to the compiler (or to me). Get rid of the offending statement and try something different.

I just realize I use the int variable instead of the scanner in the if statement. Thanks you.

--- Update ---

I'm sorry, I marked the thread by accident. Here is what I have so far. Right now, the program test if the user input is a positive integers if it not a positive or an integer, it would print "Please input an integers" but if it an integer, it would give that integer to the object parameters. The program is stuck at "" int NumTo = userNum.nextInt();" Thanks
** I understand " int NumTo = userNum.nextInt();" is awaiting for user input but how can I make it use the input that is input earlier at "Please enter the fibonacci number......".

import java.util.Scanner;
 
public class FibonacciNumbersTester
{
    public static void main(String[]args)
    {   //Variables
        Scanner userDed = new Scanner(System.in);
        Scanner userTest = new Scanner(System.in);
        String userChoice = "Y";
        FibonacciNumbers reMethod  = new FibonacciNumbers();
        while(userChoice.equalsIgnoreCase("Y"))
        {
        Scanner userNum = new Scanner(System.in);
        System.out.print("What integer would you like to calculate the Fibonacci number for? ");
 
        if(!userNum.hasNextInt() )
        {
            System.out.println("Please enter an integer!");
        }
        else if(userNum.nextInt() < 0 )
        {   
            System.out.println("Please enter a postive integer!");
 
        }
        else
        {
            System.out.println("If this print, this is where the program stuck");
            int NumTo = userNum.nextInt();
            int fiboPrint = reMethod.numFibo(NumTo);
            reMethod.printData(fiboPrint);
        }
        System.out.print("Would you like to continue? (Y/N)");
        userChoice = userDed.next();
 
        }
        }
    }

" "Please enter the fibonacci number "- I mean at "What integer would you like to calculate the Fibonacci number for? " - Sorry.

else if(userNum.nextInt() < 0 ) - This is use to compare if the number inputted by the user is a negative number.

This is a test run of the program.

What integer would you like to calculate the Fibonacci number for? 2.8
Please enter an integer!
Would you like to continue? (Y/N)Y
What integer would you like to calculate the Fibonacci number for? 2
If this print, this is where the program stuck
**Then it await for the user input again right here even though I enter it "2". Thanks

What data type should I read the user input into? If I use Int, it would give me an error when user input a double.

Thanks you for clearing that up! Could you give me a hint of which part of the program should I assign what it read so it can be use in the else statement? Thanks