title: Program for testing input and throwing exceptions how to restart when exception thrown JAVA
body: <p>Essentially the idea of this program is to test user input and throw exceptions that I've created when invalid data is entered. For example: name cannot be empty and must be all alpha characters (no special or numeric). I have embedded this in a do-while loop that will continue so long as q is not entered to quit. I'm reading in the user input via scanner line and then sending the string inputted to a function that validates whether it meets the criteria. If it does not, then the function throws my custom exceptions. It all works fine EXCEPT when the exception is thrown it still takes that string and puts it in the new Person object. </p>
  
  <p>How do I throw the exception to the user but THEN require them to re-enter the name or age until it's entered correctly?</p>
  
  <pre><code>do{
      Scanner input = new Scanner(System.in);
      System.out.println("Enter person info or q to quit.");
      System.out.print("Please enter the name of this person:");
      String name = input.nextLine();
      if(name.equalsIgnoreCase("q"))
      {
          break;
      }
      try{
          isName(name);
      }catch (InvalidNameException n){
          System.out.println(n);
      }
      System.out.print("Please enter an age for this person:");
      String age = input.nextLine();
      try{
          isValidAge(age);
      }catch(InvalidAgeException a){
          System.out.println(a);
      }
  
  
  
  public static void isName(String name) throws InvalidNameException
  {
      if(name.isEmpty())
      {
          throw new InvalidNameException("You did not enter a name.");
      }
      String[] namez = name.split(" ");
      for(int i=0;i&lt;namez.length;i++)
      {
          char[] charz = namez[i].toCharArray();
          for (char n : charz)
          {
              if(!Character.isLetter(n))
              {
                  throw new InvalidNameException("You have entered an invalid name.");
              }
          }
      }
  }
  </code></pre>