思路;
1,先按空格将字符串切割成字符串数组
2,将字符串数组反转拼接输出
/* 思路; 1,先按空格将字符串切割成字符串数组 2,将字符串数组反转拼接输出 */ public class Solution { public String ReverseSentence(String str) { if(str==null||str.length()==0)return str; String[] strs = str.split(" "); if(strs.length<=1)return str; String result = strs[strs.length-1]; for(int i =strs.length-2;i>=0;i--){ result = result+" "+strs[i]; } return result; } }