Below are two implementations for the isBlank() method. One is from the Commons Lang and the other was coded by a colleague of mine and he claims his way is better and faster.
I would like to understand how or why his or the Commons approach is better. Maybe one is not better, but I still would like to have an understanding of how and/or why someone would choose one way over the other so I can further my software development skillset. Maybe there are ramifications one way or the other that I'm not seeing and someone can shed some light on for me? My only motivation for this question is to learn and understand this stuff better. Thank you for any explanation you can provide!! I do appreciate any assistance or lessons!! //From Commons project public static boolean isBlank(String str) { int strLen; if (str == null || (strLen = str.length()) == 0) { return true; } for (int i = 0; i < strLen; i++) { if ((Character.isWhitespace(str.charAt(i)) == false)) { return false; } } return true; Versus this way of doing the test: //Modified with faster logic according to one of our developers public static boolean isBlank(String str){ int strLen; if ((str == null) || ((strLen = str.length()) == 0)) { return true; } else { str = str.trim(); if (str.length() == 0) { return true; } else { return false; } } }