Replacing a String with a character

Question

In my program, I am trying to replace “and” by a comma(“,”) using the String replace() method. But it's not working properly. Below is my code, can someone help me by pointing out what I am missing here?

String sentence = "One, Two, Three, Four and Five"
if (sentence.contains("and")){
    sentence.replace("and", ",");
}

Answer 1

Yes, you are missing out on a very important concept.

Since Strings are immutable, i.e you cannot change the values of an existing object. And in your code, you are discarding the value, returned by the replace().

So, what you need to do is:

//You do not need the if statement

String demo = "One, Two, Three, Four and Five" ;

demo = demo.replace(“and”, “,”);

Hope this helps!