Isblank vs isempty - which is better?
There is a method that has some conditional logic and returns an empty String '' (no space) in some cases. Which method is more effective/faster to use in this case: String.isEmpty() or String.isBlank()?
isblank vs isempty String.isEmpty is marginally faster (~0.00219ms vs ~0.00206ms, about 6%). This is such a trivially small amount that there's no reason to worry about which one you use from a performance perspective. Practically speaking, you should generally use String.isBlank if you expect potentially whitespace strings (e.g. from user input that may be all whitespace), and String.isEmpty when checking fields from the database, which will never contain a string of just whitespace.