Write code to check if a string has Blank space
//package com.book2s; public class Main { public static void main(String[] argv) { String str = "book2s.com"; System.out.println(hasBlank(str)); }/*from w w w .j av a 2 s . co m*/ public static boolean hasBlank(String... str) { if (str == null) { return true; } for (int i = 0; i < str.length; i++) { if (isBlank(str[i])) { return true; } } return false; } public static boolean isBlank(String str) { int length; if ((str == null) || ((length = str.length()) == 0)) { return true; } for (int i = 0; i < length; i++) { if (!Character.isWhitespace(str.charAt(i))) { return false; } } return true; } }