title: Return error with IF statement if user enters double instead of INT
body: <p>Bellow is my following code, it is currently set if the user enters a height outside of the allowed parameters. I also need it to return the same error message if they do not enter a whole number. </p>
  
  <p>EQ user enters 70.5 it gives same error.</p>
  
  <p>I have tried the || int == null but don't know if that's a proper way to do it. It also does not work that way.</p>
  
  <pre><code>import java.util.*;
  
  public class HowHealthy
  {
     public static void main(String[] args)
  {
    String scanName;  
    char scanGender;        
    String strGender;     
    double scanWeight;        
    int scanHeight;          
    int scanAge;               
    int scanLevel;             
  
    Scanner scan = new Scanner(System.in);          // Creates a new scanner so we can input the users details  
  
    // Asks for the Person's Name if it is not at least 1 charecter it gives error message and exists program.
    System.out.print("Person's name: ");
    scanName = scan.nextLine();
    if (scanName.length() &lt; 1)
    {
       System.out.println("Invalid name - must be a proper name");                                // Error message it displays
       System.exit(0);
    }
  
  
    // Asks for the Person's Gender - if its not M or F it returns error and exits program
    System.out.print(scanName + ", are you male or female (M/F): ");
    scanGender = scan.nextLine().toUpperCase().charAt(0);
    if ((scanGender != 'M') &amp;&amp; (scanGender != 'F'))
    {   
       System.out.println("Invalid gender - must be either M or F");                             // Error message it displays
       System.exit(0);
    }
    if (scanGender == 'M')           // If M is entered for gender it then assigns male to the strGender variable which is used later
    {
       strGender = "male";
    }      
    else
    {
       strGender = "female";         // If F is entered for gender it then assigns female to the strGender variable which is used later
    }
  
  
    // Asks for the Person's Weight - if its not at least 100 pounds it will return error and exit program 
    System.out.print(scanName + ", weight (pounds): ");
    scanWeight = scan.nextDouble();
    if (scanWeight &lt; 100.0)
    {
       System.out.println("Invalid weight - must be at least 100 pounds");                       // Error message it displays
       System.exit(0);
    }
  
    // Asks for the Person's Height - if its not at least 60 inches and less than 84 inches it will return an error and exits the program.
    System.out.print(scanName + ", height (inches): ");
    boolean failed = false;
    try 
    {
       scanHeight = scan.nextInt();
    }
    catch(InputMismatchException e)
    {
       failed = true;
    }
    if (failed || (scanHeight &lt; 60) || (scanHeight &gt; 84))
    {
       System.out.println("Invalid height - must be between 60 to 84 inches, inclusively");      // Error message it displays
       System.exit(0);
    }
   // System.out.print(scanName + ", height (inches): ");
   // scanHeight = scan.nextInt();
    //if ((scanHeight &lt; 60) || (scanHeight &gt; 84))
    //{
    ///  System.out.println("Invalid height - must be between 60 to 84 inches, inclusively");      // Error message it displays
    //   System.exit(0);
   // }
  
    // Asks for the Person's Age - If it is not at least 18 it gives error and exits the program.
    System.out.print(scanName + ", age (years): ");
    scanAge = scan.nextInt();
    if (scanAge &lt; 18)
    {
    System.out.println("Invalid age - must be at least 18 years");                               // Error message it displays
    System.exit(0);
    }
  
    // Prints the following lines so the user can see what activity level they would fall into.
    System.out.println("\nActivity Level: Use this categories: ");
    System.out.println("\t1 - Sedentary (little or no exercise, desk job)");
    System.out.println("\t2 - Lightly active (little exercise / sports 3-5 days/wk");
    System.out.println("\t3 - Moderately active(moderate exercise / sports 3-5 days/wk)");
    System.out.println("\t4 - Very active (hard exercise / sports 6 -7 day/wk)");
    System.out.println("\t5 - Extra active (hard daily exercise / sports  physical job or 2X day \n\t    training i.e marathon, contest, etc.)");
    System.out.print("\nHow active are you? ");
  
    // Asks for the Person's Activity level -  must be between 1 to 5 if not gives error and exits the program.
    scanLevel = scan.nextInt();
    if ((scanLevel &lt; 1) || (scanLevel &gt; 5))
    {
       System.out.println("Invalid level - must between 1 to 5");                                 // Error message it displays
       System.exit(0);
    }
  
    // Creates a new opbject called scanObject with the Healthy constructor. The inputs are the temporary variables entered above from the scanner.
    Healthy scanObject = new Healthy(scanName, scanGender, scanWeight, scanHeight, scanAge, scanLevel);
  
  
    System.out.printf("\n%s's information\n", scanObject.getName());                                   // Prints the Person's name, adds a 's and then information | uses printf
    System.out.printf("Weight: \t%-4.1f pounds \n", scanObject.getWeight());                           // Prints the Person's weight and formats it 
    System.out.printf("Height: \t%-3.1f inches \n", scanObject.getHeight());                           // Prints the Person's height and formats it
    System.out.printf("Age: \t\t%-2d years \n", scanObject.getAge());                                  // Prints the person's age and formats it
    System.out.print("These are for a " + strGender + ".\n\n");                                        // "Prints These are for a" + strGender ( which is the temporary variable that was determined from above)
  
    System.out.printf("BMR  is %.2f \n", scanObject.getBMR());                                         // Calculates and prints the BMR of the person
    System.out.printf("BMI  is %.2f \n", scanObject.getBMI());                                         // Calculates and prints the BMI of the person
    System.out.printf("TDEE is %.2f \n", scanObject.getTDEE());                                        // Calculates and prints the TDEE of the personjgraspaasd
    System.out.printf("Your BMI classifies you as %s. \n", scanObject.getWeightStatus());              // Calculates and prints the Weight Status of the person
  
  
    }     
  }
  </code></pre>