Java tutorial
//package com.java2s; //License from project: Apache License public class Main { public static boolean nonSpace(String string) { return !isSpace(string); } public static boolean isSpace(String string) { if (string == null) return true; for (int i = 0, len = string.length(); i < len; ++i) { if (!Character.isWhitespace(string.charAt(i))) { return false; } } return true; } }