I've inherited some Java. I have lots of experience with other C-like languages, but I'm still fairly new to Java. In one function, my predecessor has used both the write() and append() methods of the Writer class, but I can't figure out why. And more generally, I can't figure out why both methods exist, because Oracle's doc says, An invocation of this method of the form out.append(c) behaves in exactly the same way as the invocation out.write(c). Why do both methods exist? Do I need to care?
Because its authors decided to make Writer implement the interface Appendable.