Prompt:

Write a program that asks the user to enter a String value, an int value, and a double value. If the user enters a String of length less than three characters for the String value or enters non-numeric values for the int or double values, display a warning message to the user and reprompt the user to enter all three values.

Here are some example runs:

Enter a String value: a Invalid String value. Enter a String value: abcd Enter an int value: a Invalid numeric value. Enter a String value: abcd Enter an int value: 32 Enter a double value: dsfse Invalid numeric value. Enter a String value: abcd Enter an int value: 32 Enter a double value: 3.23 String: abcd int: 32 double: 3.230000

My ISSUE:

My program is running fine, but I need to to run a warning message after a value is entered wrong, instead I am getting "null" and the program restarts.

Can someone help me add in where a message is applied to the user if an input for entering an invalid int & double value?