Superclasses & Subclasses

• class subclassname extends superclassname{};

  With the extend keyword, the subclass inherits all methods of the superclass without duplicating code.
• a subclass has access to all the methods of the superclass
• Subclasses cannot inherit the superclass's constructors.
• super(); Calls the no-argument contructor of the superclass.

  Java instantly does it in the subclass's constructor's.
• If you call super(); With or without parameters, it must be the first line of the body of the constructor.