Validating an integer in java
The loop will continue requesting the user for another input as long as the conversion to the proper type failed.
An example of using this code in your program can be something like: In the case above, the system will repeatedly ask “Please type your ID number” until the user inserts a proper integer value.
Alright, so I have successful managed to change the code so that the message displays when a user enters a number that is not between 0 and 9.
See your article appearing on the Geeksfor Geeks main page and help other Geeks.The Integer class has a number of static methods for parsing strings.For the case where we want to check if if a string contains a valid integer we can use the method Integer.parse Int() and catch the exception that is thrown when the number cannot be parsed.Potential result would be something like: Please note: You are free to use this class in your code, as long as you keep the attribution and copyright notice.If you improve it, send it back to me and I’ll make sure to credit your improvements in the live version!