design patterns reusable object oriented

optional items with the need for inheritance. Model the optional include into a class that inherits and can cause flooding. P108 (54)When creating an inheritance layer, try to create reusable frameworks instead of reusable components. P112 (55)If you use multiple inheritance in the design, first assume that you have made a m

The object-oriented design principle is the core of OOPS (object-oriented programming system, Object-Oriented Programming System) programming. However, most Java programmers pursue

Object | concept | design In object-oriented design and implementation, we must spend time and energy figuring out these concepts: abstraction, encapsulation, inheritance, and polymorphism to and object-

61 empirical principles of Object-Oriented Design Author: Arthur J. Riel "You do not have to strictly abide by these principles and violate them and are not subject to religious penalties. But you should regard these principles as warning bells. If you violate one of them, the warning bells will ring ." ---------- Arthur J. Riel (1) All data should be hidden i

is transformed into a derived class.(49) Do not model the dynamic semantics of a class by inheriting relationships. Attempts to model dynamic semantics with static semantic relationships can result in switching types at run time.(50) Do not turn the object of the class into a derived class. Be careful with any derived class that has only one instance.(51) If you feel you need to create a new class at run time, take a step back and recognize that you

Seven main object-oriented design principles Opening and closing principles : In the face of demand, changes to the program is done by adding new code , rather than changing the original title dependency Reversal Principle : High-level modules should not rely on the underlying modules, two should be dependent on the abstract, the abstract should not rely on the

your system. Be especially careful with classes whose names contain driver, Manager, System, Susystem. Plan an interface instead of implementing one. Be careful with classes that have a large number of access methods defined in the public interface. A large number of access methods means that the relevant data and behavior are not centrally stored. Be cautious about classes that contain too many non-communicating behaviors. Another manifestation of this problem is that many get and set func

inheritance in the design, first assume that you have made a mistake. If you do not make a mistake, try to prove it. (56) as long as inheritance is used in object-oriented design, I have two questions: (1) is the derived class a special type of the thing it inherits? (2) is the base class part of the derived class? (5

model the dynamic semantics of classes. If you try to use a static semantic relationship to model dynamic semantics, the type will be switched during runtime. (50) do not convert the class object into a derived class. Be careful with any Derived classes that only have one instance. (51) If you think you need to create a new class at runtime, take a step back to recognize that you want to create an object