单词倒排

利用正则表达式求解

import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String[] s = sc.nextLine().split(" |\\$|\\!|\\#|\\*|\\.");
        int i = 0, j = s.length - 1;
        while(i < j){
            String temp = s[i];
            s[i] = s[j];
            s[j] = temp;
            i++;
            j--;
        }
        StringBuilder result = new StringBuilder();
        for(String item : s){
            result.append(item + " ");
        }
        System.out.println(result.toString().trim());
    }
}