How do I convert array of primitives into array of objects?

By Wayan Saryada in Apache Commons Lang 0 Comment

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>

Wayan Saryada

Programmer, runner, recreational diver, currently living in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, Hibernate / JPA.

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