To convert from primitive arrays into object type arrays we can user Apache Commons Lang library. The commons lang provides an ArrayUtils class that does this conversion. To convert the other way just use the toPrimitive() method.

package org.kodejava.example.commons.lang;

import org.apache.commons.lang.ArrayUtils;

public class ArrayPrimitiveObjectConversionDemo {
    public static void main(String[] args) {
        int numbers[] = {1, 2, 3, 4, 5};
        boolean booleans[] = {true, false, false, true};
        float decimals[] = {10.1f, 3.14f, 2.17f};

        Integer numbersObjects[] = ArrayUtils.toObject(numbers);
        Boolean booleansObjects[] = ArrayUtils.toObject(booleans);
        Float decimalsObjects[] = ArrayUtils.toObject(decimals);

        numbers = ArrayUtils.toPrimitive(numbersObjects);
        booleans = ArrayUtils.toPrimitive(booleansObjects);
        decimals = ArrayUtils.toPrimitive(decimalsObjects);
    }
}

Maven Dependencies

<!-- http://repo1.maven.org/maven2/commons-lang/commons-lang/2.6/commons-lang-2.6.jar -->
<dependency>
    <groupId>commons-lang</groupId>
    <artifactId>commons-lang</artifactId>
    <version>2.6</version>
</dependency>

• About
• Latest Posts

Wayan

Programmer, runner, recreational diver, live in the island of Bali, Indonesia. Mostly programming in Java, Spring Framework, Hibernate / JPA.

Latest posts by Wayan (see all)

• Install IntelliJ IDEA Community Edition and Write Hello Kotlin Program - May 13, 2018
• How do I write Hello World in Kotlin? - May 13, 2018
• How do I set the default Java (JDK) version on Mac OS X? - November 14, 2017