download the application please visit www.mrbool.com/player
Java Programmer 310-065-Lesson 7-Object
Orientation-Part 4 (Practice
questions that discuss how constructors call their super-class
constructors, and how constructors are overloaded)
Duration: 20 minutes
Summary: This video wraps up our discussion of object orientation. We covered
more practice questions that discuss how constructors call their super-class
constructors, and how constructors are overloaded. Then we talked about
polymorphism and how it applies to instance methods instead of instance
variables. We saw how a parent class can reference a child class and call its
methods. One key concept we spent some time on is class and interface design.
We looked at a class that asked us to design an application with the given
information. The final question had to do with method overloading. We saw how
the compiler looks at matching method, but the methods with var-args are the
last ones to look at.
Methodology of the development of example: Good coding standard and simplified design to
prepare for the Java programmer certification exam CX-310-065.
Technology Used: Java - Core Concepts.
Keywords: Sun Certified Java Programmer, classes, interfaces, encapsulation,
inheritance, is-a, has-a, cohesion, coupling, polymorphism, overloading,