Question

How do I get up to the first n characters of a string in Java without doing a size check first (inline is acceptable) or risking an IndexOutOfBoundsException?

Answer 1

Here’s a neat solution:

String upToNCharacters = s.substring(0, Math.min(s.length(), n));

---

^{Opinion: while this solution is "neat", I think it is actually less readable than a solution that uses if / else in the obvious way. If the reader hasn’t seen this trick, he/she has to think harder to understand the code. IMO, the code’s meaning is more obvious in the if / else version. For a cleaner / more readable solution, see @paxdiablo’s answer.}