This is an example of how to convert an array of Objects to an array of primitives. We are using the org.apache.commons.lang3.ArrayUtils class, that provides operations on arrays, primitive arrays (like int[]) and primitive wrapper arrays (like Integer[]). Converting an array of Objects to an array of primitives implies that you should:
- Create an array of Integer objects.
- Convert the objects to int primitive type using the
toPrimitive(Integer[] array)method ofArrayUtils. - You can print the results.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import org.apache.commons.lang3.ArrayUtils;
public class ObjArray2PrimArray {
public static void main(String[] args) {
// Array of Integer objects
Integer[] integers = {new Integer(1), new Integer(2), new Integer(3),
new Integer(4), new Integer(5), new Integer(6),
new Integer(7), new Integer(8), new Integer(9)};
// Convert objects to int primitive type
int[] ints = ArrayUtils.toPrimitive(integers);
// Print result
System.out.println(ArrayUtils.toString(ints));
}
}
Output:
{1,2,3,4,5,6,7,8,9}
This was an example of how to convert an array of Objects to an array of primitives in Java.
