StringBuilder append() and null values

Question

I have a list of Strings, and I want to concatenate them with spaces in between. So I\'m using StringBuilder. Now if any of the Strings ar

Answer 1

Null check as @Shynthriir has mentioned is the simplest most efficient way (AFAIK) to get around the problem.

I would however strongly recommend initiating strings to an empty string String str = ""; instead, which would save you a lot of headache in a more complex programming effort.