(Easy) Reverse Words in a String III LeetCode

Description

Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.

Example 1:

Input: "Let's take LeetCode contest"
Output: "s'teL ekat edoCteeL tsetnoc"

 

Note: In the string, each word is separated by single space and there will not be any extra space in the string.

Solution

class Solution {
    public String reverseWords(String s) {
        
        if (s==null||s.length()==0){
            return "";
            
        }
        
        String result ="";
        String [] stringArr= s.split(" ");
        
        for(int i =0; i<stringArr.length;i++){
                 
            result = result + Reverse(stringArr[i]);
            
            if(i!=stringArr.length-1){
                result = result +" ";
            }      
        } 
        return result;
         
    }
    
    public String Reverse(String s){
        
        String res = "";
        
        for(int i  = s.length()-1; i>=0; i--){
            
            res = res+s.charAt(i);        
        }
        return res;
    }
}