Write a Java program to reverse the content of a sentence (assume a single space between two words) without reverse every word

import java.util.*;
public class Solution {	
 public static String reverse_str_word(String input_sentence) {
    if (input_sentence == null) {
      throw new IllegalArgumentException("Input param can't be null.");
    }
    StringBuilder stringBuilder = new StringBuilder();
    String[] words = input_sentence.split(" ");
    for (int i = words.length - 1; i >= 0; i--) {
      stringBuilder.append(words[i]);
      if (i != 0) {
        stringBuilder.append(" ");
      }
    }
    return stringBuilder.toString();
  }
   public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Input a string: ");
		String input = scanner.nextLine();
		System.out.println("\nResult: " + reverse_str_word(input));		
		}
}

Sample Output:

Input a string:  The quick brown fox jumps over the lazy dog

Result: dog lazy the over jumps fox brown quick The