ConcurrentModificationException Immutable collections never throw these. The example below is contrived, but it illustrates the problem of updating a mutable collection while iterating over its ...

In response to my recent blog posting Immutable Java Objects, Matt brought up a good point of discussion related to making Java classes truly immutable by declaring them as final so that they ...

Mutable class with a convert-to-immutable-version method The previous pattern is suitable for read-only data whose usage is short-lived (e.g., scoped to a method).