Is Empty 

Apache Commons Lang 3.0 is a java library with lot of utilities and reusable components. This requires the library commons-lang3-3.0.1.jar to be in classpath. The following example shows using StringUtils.isEmpty() API. It returns TRUE if the given string is empty.

File Name  :   com/bethecoder/tutorials/commons_lang/tests/strings/IsEmptyTest.java  Author  :   Sudhakar KV Email  :   [email protected]

package com.bethecoder.tutorials.commons_lang.tests.strings; import org.apache.commons.lang3.StringUtils; public class IsEmptyTest {   /**    * @param args    */   public static void main(String[] args) {     System.out.println(StringUtils.isEmpty(null));     System.out.println(StringUtils.isEmpty(""));     System.out.println(StringUtils.isEmpty(" "));     System.out.println(StringUtils.isEmpty("BTC"));   } }

true
true
false
false