题解 | HJ31 #单词倒排#

import java.util.*;

// 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) {
// 输入:I am a student
//输出：student a am I
//输入：$bo*y gi!r#l
//输出：l r gi y bo

        //输入字符串
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();


        //先去除闲杂字符用%替换
        char[] chars = str.toCharArray();
        String replace = null;
        for (int i = 0; i < chars.length; i++) {
            if (chars[i] < 65 || chars[i] > 122 || (chars[i] > 90 && chars[i] < 97)) {
                replace = str.replace(chars[i], '\t');
                str = replace;
            }
        }
        //得到了初步处理后的字符串"bo y gi r"
        String trim = str.trim();
//        System.out.println(trim);
//将bo y gi r用split分开然后倒序输出
        String[] split = trim.split("\t");
        for (int i = split.length - 1; i >= 0 ; i--) {
            System.out.print(split[i] + " ");
        }

    }
}