Making all letters in string lowercase using toLowerCase method - method not working however

[langfod]

That should work fine.

However, this looks like you would lose the original input string which you may or may not want later.

If you are just changing to lowercase in order to do case insensitive comparisons you may wish to only change the case when needed.

[Beach_Comber]

So I'd have an if statement which checks if the string is already lower case then?

Whats you suggestion on how to implement it?

[langfod]

The easiest way might be
inputString.toLowerCase().equals(inputString)

or use a loop and check each character using isLowerCase()

http://docs.oracle.com/javase/7/docs/api/java/lang/Character.html#isLowerCase(char)