Serialization

• An object can be made Serializable by implementing the Serializable.

SerialVersionUID

• Serialization process associates an ID with each serializable class on runtime → SerialVersionID
• Used to verify that sender and reciever of the serialized object are the same. Throws InvalidClassException otherwise.
• We can generate our own SerialVersionUID by creating a static final long serialVersionUID field in the class. Suggested to have it private and declare it in the class itself.

transient keyword

If you don't want to serialize any data member of the class - that is, you don't want it to be stored - mark it (prefix it) with transient.