Comment by Federico klez Culloca on In Java, whether length 1 primitive type array or, its wrapper object is good in performance or memory friendly?

Before focusing on memory performance (which you can measure with a profiler, by the way) I would go with correctness. Using an array to wrap a single value just because an array is technically an object is working around the language. The correct wrap type for a char is Character. That's what those classes (Integer, Double, Character) etc. are for.