This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
The rules of the Java language say that the parent class's constructor must complete before the child's constructor executes. The is enforced by requiring that the first statement in every constructor (except Object's) is a call to either a parent's constructor or to another constructor in the current class (which will eventually lead to a current class c'tor that invokes a parent c'tor).