Question

Write a method reverse that takes an array as an argument and returns a new array with the elements in reversed order. Do not modify the array.

Answer 1

Answer:

public class ArrayUtils

{

//function to reverse the elements in given array

public static void reverse(String words[])

{

//find the length of the array

int n = words.length;

//iterate over the array up to the half

for(int i = 0;i < (int)(n/2);i++)

{

//swap the first element with last element and second element with second last element and so on.

String temp;

temp = words[i];

words[i] = words[n - i -1];

words[n - i - 1] = temp;

}

}

public static void main(String args[])

{

//create and array

String words[] = {"Apple", "Grapes", "Oranges", "Mangoes"};

//print the contents of the array

for(int i = 0;i < words.length;i++)

{

System.out.println(words[i]);

}

//call the function to reverse th array

reverse(words);

//print the contents after reversing

System.out.println("After reversing............");

for(int i = 0;i < words.length;i++)

{

System.out.println(words[i]);

}

}

Explanation: