A Programmer[ap]s Guide to Java Certification

The following information was included in this chapter:

  • inheritance and its implications in OOP

  • overriding and hiding of superclass members

  • method overriding vs. method overloading

  • usage of super reference to access superclass members

  • usage of this() and super() calls, including constructor chaining

  • interfaces and multiple interface inheritance

  • subtype- supertype relationship

  • conversions due to assigning, casting, and passing reference values

  • identifying the type of objects using the instanceof operator

  • polymorphism and dynamic method lookup

  • inheritance ( is-a ) vs. aggregation ( has-a )

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