输入一个英文语句，每个单词用空格隔开

英文语句，每个单词用空格隔开"/>

输入一个英文语句，每个单词用空格隔开

//输入一个英文语句，每个单词用空格隔开。保证输入只包含空格和字母。

package demo0424;
import java.util.*;
import java.io.*;
public class Main{public static void main(String[] args)throws Exception{BufferedReader br = new BufferedReader(new InputStreamReader(System.in));String str;while((str = br.readLine()) != null){StringBuilder sb = new StringBuilder();int n = str.length();char[] chars = str.toCharArray();int i = 0, j = 0;while(j<= n){if(j == n || chars[j] == ' '){reverse(chars,i,j-1);i = j+1;}j++;}reverse(chars,0,n-1);System.out.println(new String(chars));}}public static void reverse(char[] chars, int i , int j){while(i< j){swap(chars,i++,j--);}}public static void swap(char[] chars, int i, int j){char c = chars[i];chars[i] = chars[j];chars[j] = c;}
}