Reverse words in a string | Leetcode problem 151

Reverse words in a String
Leetcode problem number 151

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[inspiremusicandinspirephar]

hats off to your dediication towards your work and professionalism

[anshumankumarnathshahdev]

thanks for the beautiful explanation . also your voice was very pleasent to my ears .

[thulasiramans]

Your's teaching is excellant mam. Put more videos mam. And I humbly request to give time complexity for the each problem

[rajdeeppatil]

such a sweet and simple solution, thank q mam.

[naveennaidu]

How can we write without split function

[VinaySangem]

mam why we are using + for s.split(" ");

[VinaySangem]

mam, plz maintain git link to store all codes

[kandukuriveeranikhil]

Mam while executing the same we are getting errors mam ( :, s, regex, its showing as illegal expressions ) and while we are taking the inputs from user also we are facing the issue

[Jai_Jai_shri_Ram]

In this question given space complexity: o(1)

[ashokkumar-nbri]

Hi, I am trying to do reverse the words which is separated by dot. Here is an example and code
String inp = " Welcome.to.Java.Programming ";

static String reverseWords(String str) {
String rev ="";
str = str.trim();
String[] words = str.split("\\.");

StringBuilder sb = new StringBuilder();

for (int i = words.length -1 ; i >= 0; i--) {
sb.append(words[i]);
sb.append(".");
}
return sb.toString().trim();
}

Output: Programming.Java.to.Welcome.
I could see dots are getting added for each iteration which makes the incorrect output. Could you please check and suggest me how to handle the situation