How to check if Two Arrays are Equal in Java - Step by Step Examples

How to check if Two Arrays are Equal in Java ?

Answer

To check if two arrays are equal in Java, you can use the Arrays.equals method or compare each element of the arrays manually.

✐ Examples

1 Check Equality of Arrays using Arrays.equals

In this example,

We create two integer arrays named arr1 and arr2 with some elements.
We use the Arrays.equals method to compare the equality of arr1 and arr2.
The Arrays.equals method returns true if the arrays are equal and false otherwise.
Finally, we print the result of the comparison to standard output.

Java Program

import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        int[] arr1 = {1, 2, 3};
        int[] arr2 = {1, 2, 3};
        boolean isEqual = Arrays.equals(arr1, arr2);

        System.out.println("Arrays are equal: " + isEqual);
    }
}

Output

Arrays are equal: true

2 Check Equality of Arrays Manually

In this example,

We create two integer arrays named arr1 and arr2 with some elements.
We compare the lengths of arr1 and arr2 to ensure they have the same number of elements.
We iterate through both arrays and compare each element.
If any elements are not equal during the iteration, we set a boolean flag to indicate inequality.
Finally, we print the result of the comparison to standard output.

Java Program

public class Main {
    public static void main(String[] args) {
        int[] arr1 = {1, 2, 3};
        int[] arr2 = {1, 2, 3};
        boolean isEqual = true;

        if (arr1.length != arr2.length) {
            isEqual = false;
        } else {
            for (int i = 0; i < arr1.length; i++) {
                if (arr1[i] != arr2[i]) {
                    isEqual = false;
                    break;
                }
            }
        }

        System.out.println("Arrays are equal: " + isEqual);
    }
}

Output

Arrays are equal: true

Summary

In this tutorial, we learned How to check if Two Arrays are Equal in Java language with well detailed examples.

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How to check if Two Arrays are Equal in Java - Step by Step Examples

How to check if Two Arrays are Equal in Java ?

Answer

✐ Examples

1 Check Equality of Arrays using Arrays.equals

Java Program

Output

2 Check Equality of Arrays Manually

Java Program

Output

Summary

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