题解 | 句子逆序

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
   public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        String sentence=scanner.nextLine();
        String reversed=reverseWords(sentence);
        System.out.println(reversed);
    }

    private static String reverseWords(String sentence) {
        String[] words=sentence.split(" ");
        StringBuilder reversedSentence=new StringBuilder();
        for (int i=words.length-1;i>=0;i--){
            reversedSentence.append(words[i]);
            if (i>0){
                reversedSentence.append(" ");
            }
        }
        return reversedSentence.toString();
    }
}