Answer:
Here is the JAVA program:
class Main { //class name
public static boolean compare (String[] array1, String[] array2) { //method that accepts two String arrays as parameters and returns a boolean
if (array1 == array2) //if array1 and array2 are equal
return true; //returns true
if (array1 == null || array2 == null) //if array1 or array 2 is null
return false; //returns false
int n = array1.length; //computes the length of array1 and stores it in n variable
if (n != array2.length) //if length of array1 is not equal to that of array2
return false; //returns false
for (int i = 0; i < n; i++) { //iterates through the arrays
if (!array1[i].equals(array2[i])) //if i-th index of array1 is not equal to i-th index of array2
return false; } //returns false
return true; } //returns 2 otherwise
public static void main(String[] args) { //start of main method
String[] array1 = { "Hello", "World" }; //declares and initializes array1
String[] array2 = { "Hello", "World"}; //declares and initializes array1
System.out.println(compare(array1, array2)); } } //calls compare method to check if both string type arrays are equal
Explanation:
The method compare that accepts two String arrays as parameters and returns a boolean true if both arrays contain the same values otherwise returns false.
if (array1 == array2) This checks if both arrays are equal then they contain same values and method returns true.
if (array1 == null || array2 == null) This is used to check if any of the array is null and if any of the two arrays is null then this means they do not contain same values so method returns false
if (n != array2.length) This condition checks if the length of both arrays is same.
Next the for loop for (int i = 0; i < n; i++) executes which has an if statement if (!array1[i].equals(array2[i])) that uses equals() method to compare two strings, and returns false if this if condition evaluates to true, otherwise false.
The screenshot of the program along with its output is attached.
