Object-Oriented Features

• An existing class may be extended via inheritance

  class MyDerivedClass extends MyClass {
      ...
  }
  

• All non-private variables and methods within MyClass are available within MyDerivedClass
• Additional class variables and methods may be defined, which are specific only to MyDerivedClass
• Methods declared in a derived class with the same signature (method name, return type, number of arguments, and types of arguments) override methods in the base class