反转字符串标记的输出

Question

下面按顺序打印出输入的句子。我需要它以相反的顺序打印输入：

import java.util.Scanner;


public class Sentence {
    public static void main(String [] args) {
        Scanner input = new Scanner(System.in);
        System.out.print("Enter a sentence: ");
        String sentence = input.nextLine();

        String[] tokens = sentence.split(" ");
        System.out.println(tokens.length);

        for (String token : tokens) {
            System.out.println(token);
        }   
    }
}

Answer 1

使用常规 for 循环并从最后一个索引打印到第一个索引：

for (int i = tokens.length-1; i>=0;i--) {
        System.out.println(tokens [i]);
    }

Answer 2

你是按照句子的顺序打印记号，绝不会颠倒过来。尝试反向循环

for(int i = tokens.length -1; i >= 0; i--)
{
  System.out.println(tokens[i]);
}

Answer 3

你可以用这个来反驳你的句子。它将打印：句子 a 是 This

    String sentence = "This is a sentence";

    String[] tokens = sentence.split(" ");
    System.out.println(tokens.length);

    for (int i = tokens.length-1; i >= 0; --i) {
        System.out.print(tokens[i]);
        System.out.print(" ");
    }

反转字符串标记的输出

Reversing ouput of string token

java

string

reverse

token