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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
an empty method (that is, a method that does not do anything) in the derived class. P103 (53)Do not confuse 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
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. Now, we can generalize these objects into a class. (52) it s
frameworks rather than reusable components when creating an inheritance hierarchy. (55) If you use multiple 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
reusable inheritance LayersFrameworkInstead of reusable components. (55) If you use multiple 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
of access methods in the public interface. A large number of access methods means that the relevant data and behavior are not centrally stored. (15) Be more careful with classes that contain too much communication behavior. Another manifestation of this problem is the creation of many get and set functions in the public interface of the classes in your application. (16) In an application composed of an object-ori
of access methods in the public interface. A large number of access methods means that the relevant data and behavior are not centrally stored. (15) Be more careful with classes that contain too much communication behavior. Another manifestation of this problem is the creation of many get and set functions in the public interface of the classes in your application. (16) In an application composed of an object-ori
Before studying the design patterns of object-oriented design, I had a vague understanding of Java interfaces and Java Abstract classes. When I first learned the Java language, it was hard to understand why the concept of interfaces was required. Although multi-inheritance c
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
class that inherits and can cause flooding. (54) try to create reusable frameworks rather than reusable components when creating an inheritance hierarchy. (55) If you use multiple 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
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. Now, we can generalize these objects into a class.(52) it should be illegal to overwrite the methods in the base class by using an empty
the dynamic semantics of a class by inheriting relationships. Attempting to model dynamic semantics with a static semantic relationship causes the type to be switched 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, step back to see what you are creating. Now, generalize these objects into a class.(52) It
mechanism to implement the multi-threaded Singleton ModeClass Singleton3 { Public static readonly Singleton3 Instance = new Singleton3 (); Private Singleton3 (){}}Class Singleton3_1{Public static readonly Singleton3_1 Instance = new Singleton3_1 (); Private Singleton3_1 (){} Static Singleton3_1 (){Instance = new singleton3_1 ();}} Singleton mode ExtensionExtend an instance to N instances, such as the implementation of the Object pool.Transfers the c
The object-oriented design principle is the core of OOPS (object-oriented programming system) programming.Design patterns such as Singleton, decorator, and observer do not focus on Object
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
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
(string audiotype) { switch (audiotype.tolower ()) { case ("MP3"): PlayMp3 (); break; case ("wav"): playwav (); break; } } } Naturally, you will find this design very bad. Because it does not provide a minimum scale for future changes in requirements. If your design turns out to be the case, then when you're overwhelmed by the overwhelming demand change, you might want to get 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
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