Default String 

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.defaultString() API. It returns an empty string if the given string is null, otherwise returns the same string back.

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

package com.bethecoder.tutorials.commons_lang.tests.strings; import org.apache.commons.lang3.StringUtils; public class DefaultStringTest {   /**    * @param args    */   public static void main(String[] args) {               //StringUtils.defaultString(String str)     System.out.println(StringUtils.defaultString(null));   //empty     System.out.println(StringUtils.defaultString(""));     //empty     System.out.println(StringUtils.defaultString("java")); //java     //StringUtils.defaultString(String str, String defaultStr)     System.out.println(StringUtils.defaultString(null, "N/A"));  //N/A     System.out.println(StringUtils.defaultString("", "N/A"));    //empty     System.out.println(StringUtils.defaultString("java", "N/A"));//java   } }

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N/A

java