Example: ArrayEqualityStreamAPI in Java

// ArrayEqualityStreamAPI
import java.util.Arrays;
import java.util.List;
import java.util.stream.IntStream; // For primitive int arrays

public class Main {
    public static <T> boolean areArraysEqualStream(T[] arr1, T[] arr2) {
        // Step 1: Handle null arrays
        if (arr1 == null && arr2 == null) {
            return true;
        }
        if (arr1 == null || arr2 == null) {
            return false;
        }

        // Step 2: Check if arrays have the same length
        if (arr1.length != arr2.length) {
            return false;
        }

        // Step 3: Compare elements using streams
        // IntStream.range creates a stream of indices (0 to length-1)
        // allMatch checks if all elements satisfy the given predicate
        return IntStream.range(0, arr1.length)
                        .allMatch(i -> java.util.Objects.equals(arr1[i], arr2[i]));
    }

    public static boolean areIntArraysEqualStream(int[] arr1, int[] arr2) {
        // Step 1: Handle null arrays
        if (arr1 == null && arr2 == null) {
            return true;
        }
        if (arr1 == null || arr2 == null) {
            return false;
        }

        // Step 2: Check if arrays have the same length
        if (arr1.length != arr2.length) {
            return false;
        }

        // Step 3: Compare elements using streams (for primitives)
        // For primitive arrays, direct == comparison is usually fine
        return IntStream.range(0, arr1.length)
                        .allMatch(i -> arr1[i] == arr2[i]);
    }

    public static void main(String[] args) {
        Integer[] objArr1 = {1, 2, 3};
        Integer[] objArr2 = {1, 2, 3};
        Integer[] objArr3 = {1, 3, 2};
        Integer[] objArr4 = {1, null, 3};
        Integer[] objArr5 = {1, null, 3};

        System.out.println("--- Object Array Examples (Integer[]) ---");
        System.out.println("objArr1 and objArr2 equal: " + areArraysEqualStream(objArr1, objArr2));
        System.out.println("objArr1 and objArr3 equal: " + areArraysEqualStream(objArr1, objArr3));
        System.out.println("objArr4 and objArr5 equal: " + areArraysEqualStream(objArr4, objArr5));

        int[] intArr1 = {10, 20, 30};
        int[] intArr2 = {10, 20, 30};
        int[] intArr3 = {10, 20, 40};

        System.out.println("\n--- Primitive Array Examples (int[]) ---");
        System.out.println("intArr1 and intArr2 equal: " + areIntArraysEqualStream(intArr1, intArr2));
        System.out.println("intArr1 and intArr3 equal: " + areIntArraysEqualStream(intArr1, intArr3));
    }
}