ShowInputLoop.html

//********************************************************************
// ShowInputLoop.java
// Demonstrates an input loop that accepts only in-range input.
// Author: M.B. Feldman, The George Washington University
// Last Modified: October, 2002
//********************************************************************

import cs1.Keyboard;
public class ShowInputLoop
{
public static void main (String[] args)
{
    final int MIN_VAL = -10;
    final int MAX_VAL = +10;
    int num1;

boolean validityFlag = false;

    while (!validityFlag)
    {
      System.out.println ("Please enter an integer between " +
      MIN_VAL + " and " + MAX_VAL + " >");
      num1 = Keyboard.readInt();
      if ((num1 >= MIN_VAL) && (num1 <= MAX_VAL))
      {
        validityFlag = true;
      }
      else
      {
        System.out.println
          ("Out of range input - please try again.");
      }
    }
    System.out.println ("By George, I think you've got it!");
    System.out.println ("In a real program, we'd continue here.");
}
}