Benefits of Immutable Classes in Java

Immutable classes’ offers several benefits, here are few to mention:

1) Immutable objects are by default thread safe, can be shared without synchronization in concurrent environment.

2) Immutable object simplifies development, because it’s easier to share between multiple threads without external synchronization.

3) Immutable object boost performance of Java application by reducing synchronization in code.

4) Another important benefit of Immutable objects is reusability, you can cache Immutable object and reuse them, much like String literals and Integers.  You can use static factory methods to provide methods like valueOf(), which can return an existing Immutable object from cache, instead of creating a new one.