String Empty to Null 

Google Guava is a java library with lot of utilities and reusable components. This requires the library guava-10.0.jar to be in classpath. The following example shows using Strings.emptyToNull() API. It returns NULL if the given string is EMPTY otherwise returns the original string.

File Name  :   com/bethecoder/tutorials/guava/base_tests/EmptytoNullTest.java  Author  :   Sudhakar KV Email  :   [email protected]

package com.bethecoder.tutorials.guava.base_tests; import com.google.common.base.Strings; public class EmptytoNullTest {   /**    * @param args    */   public static void main(String[] args) {     String str = "";  //null     str = Strings.emptyToNull(str);     System.out.println("String : " + str);   } }

String : null