This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
If super-class is not serializable but subclass is serializable
1. The super class must have no argument constructor accessible to subclass.
2. This constructor will be used to initialize subclass' sub-object.