How to check if a String is empty 

Jodd is an open-source java library with lot of reusable components and feature rich utilities. This requires the library jodd-3.3.2.jar to be in classpath. The following example shows how to verify whether the given string is empty or not using StringUtil.isEmpty() API.

File Name  :   com/bethecoder/tutorials/jodd/utils/StringEmptyTest.java  Author  :   Sudhakar KV Email  :   [email protected]

package com.bethecoder.tutorials.jodd.utils; import jodd.util.StringUtil; public class StringEmptyTest {   /**    * @param args    */   public static void main(String[] args) {     System.out.println(StringUtil.isEmpty(null));     System.out.println(StringUtil.isEmpty(""));     System.out.println(StringUtil.isEmpty("  "));     System.out.println(StringUtil.isEmpty("ABCD"));   } }

true
true
false
false