题解 | #单词倒排#

感觉简单题都要用到正则

import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        String str = in.nextLine();

        String regex = "[a-zA-Z]+";
        Pattern pattern = Pattern.compile(regex);
        List<String> list = new ArrayList();

        Matcher matcher = pattern.matcher(str);
        while (matcher.find()){
            list.add(matcher.group());
        }

        for(int i = list.size()-1; i >= 0; i--){
            System.out.print(list.get(i)+" ");
        }

    }



}