How to insist that a users input is an int?

Question

Basic problem here.. I will start off by asking that you please not respond with any code, as that likely will only confuse me further (programming noob). I am looking for

Answer 1

Here's a simple example with prompts and comments.

Scanner scan = new Scanner(System.in);
System.out.print("Enter an integer: "); // Initial prompt for input

// Repeat until next item is an integer
while (!scan.hasNextInt()) 
{        
    scan.next(); // Read and discard offending non-int input
    System.out.print("Please enter an integer: "); // Re-prompt
}

// At this point in the code, the user has entered an integer
int input = scan.nextInt(); // Get the integer

// And now you can use the input variable.