Trim To Null 

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.trimToNull() API. If the result of string after trim is EMPTY it returns NULL, otherwise returns trimmed string.

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

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

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BTC