Java doesn't work like this, java.lang.String and java.lang.StringBuffer aren't related through inheritance and when you call StringBuffer.toString () a brand new String is created with a copy of ...

In Mutable and Immutable Objects, David O’Meara specifies that there are two approaches for ensuring methods are not overridden in a class designed to be immutable.

Q: How do I create my own pair of mutable and immutable classes similar to String and StringBuffer ? A: Immutability in a “weak” sense (for lack of a better term) means creating a temporary ...