4003-707 Advanced Java Programming

all, section 5.

5. Class Relationships

Class declarations define new reference types and describe how they are implemented.
Constructors are similar to methods, but cannot be invoked directly by a method call; they are used to initialize new class instances. Like methods, they may be overloaded.
Static initializers are blocks of executable code hat may be used to help initialize a class when it is first loaded.
The body of a class declares members, static initializers, and constructors.
The scope of the name of a member is the entire declaration of the class to which the member belongs. Field, method, and constructor declarations may include the access modifiers public, protected, or private. The members of a class include both declared and inherited members.
Newly declared fields can hide fields declared in a superclass or superinterface. Newly declared methods can hide, implement, or override methods declared in a superclass.
visibility modifier: public/private/protected
Return type: void/primitive type/reference to a object
Class methods/Class variables are declared with static.
Static declaration inside a method change the lifetime of a variable.