Object Array to Primitive Array 

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 ArrayUtils.toPrimitive() API. It converts an array of objects to primitives.

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

package com.bethecoder.tutorials.commons_lang.tests.arrays; import org.apache.commons.lang3.ArrayUtils; public class ToPrimitiveTest {   /**    * @param args    */   public static void main(String[] args) {     Integer [] intObjs = new Integer[] {       new Integer(6), null, new Integer(8), null, new Integer(4)       };          int [] ints = ArrayUtils.toPrimitive(intObjs, -1);     System.out.println(ArrayUtils.toString(ints));   } }

{6,-1,8,-1,4}