Check whether an array is of primitive type or not

Arrays are objects in java. Every object in java has a class associated with it. By using the class, we can check whether the array is of primitive type or not.

I would recommend you go through my tutorial to know about the class of the array.

Is array a primitive type or object in java?

Below program checks whether an array is a primitive type array or not.

Test.java

package com.sample.test;

import java.util.HashSet;
import java.util.Set;

public class Test {

 private static final Set<Class<?>> PRIMITIVE_CLASSES = new HashSet<>();

 static {
  loadPrimitiveClasses();
 }

 private static void loadPrimitiveClasses() {
  PRIMITIVE_CLASSES.add(new byte[0].getClass());
  PRIMITIVE_CLASSES.add(new short[0].getClass());
  PRIMITIVE_CLASSES.add(new int[0].getClass());
  PRIMITIVE_CLASSES.add(new long[0].getClass());
  PRIMITIVE_CLASSES.add(new float[0].getClass());
  PRIMITIVE_CLASSES.add(new double[0].getClass());
  PRIMITIVE_CLASSES.add(new boolean[0].getClass());
  PRIMITIVE_CLASSES.add(new char[0].getClass());
 }

 public static boolean isprimitiveArray(Class<?> clazz) {
  if (clazz == null) {
   throw new IllegalArgumentException("clazz shouldn't be null");
  }
  return PRIMITIVE_CLASSES.contains(clazz);
 }

 private static class Employee {

 }

 public static void main(String args[]) {
  int arr[] = new int[10];
  Employee emps[] = new Employee[10];

  System.out.println("is arr primitive? : " + isprimitiveArray(arr.getClass()));
  System.out.println("is emps primitive? : " + isprimitiveArray(emps.getClass()));
 }
}

Output

is arr primitive? : true

is emps primitive? : false

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