A DESCRIPTION OF THE PROBLEM :
At the moment java doesn't have a String.remove method. That confuses people a lot:

https://stackoverflow.com/questions/4576352/remove-all-occurrences-of-char-from-string
https://stackoverflow.com/questions/5695623/remove-characters-from-a-string-in-java
https://stackoverflow.com/questions/8694984/remove-part-of-string-in-java
https://stackoverflow.com/questions/7775364/how-can-i-remove-a-substring-from-a-given-string

Right now it is possible to do so with String.repalce(string, string). But it is not that effective as it could be, especially for the cases with a single char like this:

.replace(".", "")

for example replace(char, char) outperforms replace(string, string) for the single character by four times.

JDK itself uses this code pattern a lot, so it could be improved as well.