You say in your question that you want to chage test's to test\'s, but your code is trying to change it to test'/s
Assuming you wanted what you said in the question, you need to escape the '\', because '\' is a special character in Java Strings. Try
@Ronda - this will work because test is a String reference, so the second line actually just points it at the new String and the original String is no longer referenced and so is available for garbage collection.
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com