Encapsulation

[Sarath Koiloth Ramath]

An immutable class is always tightly encapsulated, but not every tightly encapsulation class is immutable.what it this saying ?

[Swapnil Sonawane]

Here is the link which explains what immutable classes are:

http://www.sap-img.com/java/how-to-make-a-java-class-immutable.htm

I hope this explains you.

[Olivier Ledru]

In the real life, your beans have getter and setter, and your class is thightly encapsulated, but using the setter of your bean, you can change its internal state, so your bean has not to be immutable. Actually, it generally isn't immutable.