Question

Does anyone knows how to replace the last word in a String.

Currently I am doing:

someStr = someStr.replace(someStr.substring(someStr.lastIndexOf(" ") + 1), "New Word");

The above code replaces every single occurance of the word in the string.

Thanks.

Answer 1

You could create a new string “from scratch” like this:

someStr = someStr.substring(0, someStr.lastIndexOf(" ")) + " New Word";

Another option (if you really want to use “replace” 🙂 is to do

someStr = someStr.replaceAll(" \\S*$", " New Word");

replaceAll uses regular expressions and \S*$ means a space, followed by some non-space characters, followed by end of string. (That is, replace the characters after the last space.)