To Integer 

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 NumberUtils.toInt() API. It converts the string to int. If the conversion fails, it returns ZERO.

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

package com.bethecoder.tutorials.commons_lang.tests.numbers; import org.apache.commons.lang3.math.NumberUtils; public class ToIntTest {   /**    * @param args    */   public static void main(String[] args) {     //NumberUtils.toInt(String str)     System.out.println(NumberUtils.toInt(null));     System.out.println(NumberUtils.toInt(""));     System.out.println(NumberUtils.toInt("123"));     //NumberUtils.toInt(String str, int defaultValue)     System.out.println(NumberUtils.toInt(null, 6));     System.out.println(NumberUtils.toInt("", 6));     System.out.println(NumberUtils.toInt("123", 6));   } }

0
0
123

6
6
123