Java String Manipulation: Reversing Word Order in a Sentence

Q - Write a Java program that reverses the order of words in a given sentence.

import java.awt.*;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.Scanner;

import static java.lang.System.in;

public class demo {
    public static void main(String[] args) {

      String str = "My name is Gulshan";
      String[] arr = str.split(" ");
      int arrLen = arr.length;

        List<String> result = new ArrayList<>();
        for (int i=(arrLen-1); i>=0; i--){
            result.add(arr[i]);
        }

        System.out.println("Original String: " + str);
        System.out.print("String after reverse: " );

        for (String a:result) {
            System.out.print(a + " ");
        }

    }// write all the code above this line
}

// output
// Original String: My name is Gulshan
// String after reverse: Gulshan is name My