Check if two Object Arrays are equal or not in Java
Declaration :
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public static boolean equals(Object[] a, Object[] a2) |
Explanation :
| Purpose | The java.util.Arrays.equals(Object[] a Object[] a2) method returns true if the two specified arrays of objects are equal to one another.The two arrays are considered equal if both arrays contain the same number of elements and all corresponding pairs of elements in the two arrays are equal.Two objects e1 and e2 are considered equal if (e1==null ? e2==null : e1.equals(e2)).The two arrays are equal if they contain the same elements in the same order.Two array references are considered equal if both are null. |
| Parameters | a ===> This is the array to be tested for equality. |
| a2 ===> This is the other array to be tested for equality. | |
| Return Value | This method returns true if the two arrays are equal else false. |
| Exception | NA |
Java Program : Example
Below example will explain java.util.Arrays.equals() method.
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package com.c4learn; import java.util.Arrays; public class ArrayDemo { public static void main(String[] args) { // Initialize 3 object arrays Object[] arr1 = new Object[] { 10, 20, 30 }; Object[] arr2 = new Object[] { 10, 21, 30 }; Object[] arr3 = new Object[] { 10, 20, 31 }; // Compare arrays arr1 and arr2 boolean returnV1 = Arrays.equals(arr1, arr2); System.out.println("Is arr1 and arr2 equal : " + returnV1); // Compare arrays arr1 and arr3 boolean returnV2 = Arrays.equals(arr1, arr3); System.out.println("Is arr1 and arr3 equal : " + returnV2); // Compare arrays arr2 and arr3 boolean returnV3 = Arrays.equals(arr2, arr3); System.out.println("Is arr2 and arr3 equal : " + returnV3); } } |
Output of Program :
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Is arr1 and arr2 equal : false Is arr1 and arr3 equal : false Is arr2 and arr3 equal : false |