Reverse Words in Sentence in Java

Reverse the order of words in a sentence.

BeginnerModule 4: String ProgramsExample 14 of 25
reverse-words-in-sentence.java
1import java.util.Scanner;
2
3public class Main {
4 public static void main(String[] args) {
5 Scanner sc = new Scanner(System.in);
6 System.out.print("Enter a sentence: ");
7 String s = sc.nextLine().trim();
8
9 String[] words = s.split("\\s+");
10 StringBuilder sb = new StringBuilder();
11 for (int i = words.length - 1; i >= 0; i--) {
12 sb.append(words[i]).append(" ");
13 }
14 System.out.println("Reversed words: " + sb.toString().trim());
15 sc.close();
16 }
17}

Output

Enter a sentence: Java is fun
Reversed words: fun is Java

What's going on

We split into words and rebuild string from last word to first.