Java Collections - Arrays.hashCode() Examples

[Last Updated: Nov 8, 2025]

Class:

java.util.Arrays

Methods:

These methods return a hash code based on the contents of the specified array.

public static int hashCode(long[] a)

public static int hashCode(int[] a)

public static int hashCode(short[] a)

public static int hashCode(char[] a)

public static int hashCode(byte[] a)

public static int hashCode(boolean[] a)

public static int hashCode(float[] a)

public static int hashCode(double[] a)

public static int hashCode(Object[] a)

Examples

package com.logicbig.example.arrays;

import java.util.Arrays;

public class HashCodeExample {

    public static void main(String... args) {
        int[] arr1 = {3, 5, 6, 7, 9};

        //native
        int h1 = arr1.hashCode();

        //individual direct elements#hashCode, if element is array then native
        int h2 = Arrays.hashCode(arr1);

        System.out.println(h1);
        System.out.println(h2);
    }
}

Output

562090078
31554661

For nested arrays we should use Arrays#deepHashcode()

package com.logicbig.example.arrays;

import java.util.Arrays;

public class HashCodeExample2 {

    public static void main(String... args) {
        Object[] arr1 = {3, 5, new int[]{6, 7, 9}};

        //native
        int h3 = arr1.hashCode();

        //individual direct elements#hashCode, if element is array then native
        int h2 = Arrays.hashCode(arr1);

        //deep, recursive elements#hashcode
        int h1 = Arrays.deepHashCode(arr1);

        System.out.println(h1);
        System.out.println(h2);
        System.out.println(h3);
    }
}

Output

68612
1739632230
52426758

Java Collections - Arrays.hashCode() Examples

Class:

Methods:

Examples

Output

Output

See Also