design patterns elements of reusable object oriented software book pdf

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

need to implement personality, the specific object will be called.Encapsulation of ClassesThe responsibilities of low-level modules should not be done by high-layer modules, or the encapsulation of classes will be broken.The specifics of the encapsulation of classes in a program are:1. Duplicate the object that defines the class.2. Cross-use of various kinds of objects, the correct usage is that after one

Some experiences in Object-Oriented Analysis and Design Analysis, Design and Implementation What I understand is the true object that exists or does not exist in real life. An obvious feature of this object is that it has many st

Sharing (six principles of object-oriented design model) and six design models I recently read an article titled "Please call me your first brother" on the six principles of the design mode. It is simple, easy to understand and can't help but repost and share it with me !!

　　Why Study Design Patterns:1, more in-depth understanding of object-oriented thinking2, is conducive to the development of a strong extension of things　　What is a design pattern: a typical solution for a typical scenario that often occurs is the

package, it will affect all classes in the package, but it will not affect other packages. Package coupling principle No-ring dependency principle (Acyclic Dependencies Principle, ADP) The package dependency does not allow loops. Stable-Dependencies Principle, SDP) Dependency in a stable direction Stable-abstractions principle (SAP) The abstraction level of the package should be consistent with its stability. Old ti

responsibilities are coupled. A change in responsibility may weaken or suppress the ability of other responsibilities of this category. This design will lead to a fragile design. When a change occurs, the design will be unexpectedly damaged. SRP makes the system easier to manage and maintain because not all problems are involved. Cohesion is actually another n

Labels: OCP Java design mode Object-Oriented Design1. Single Responsibility Principle The core idea of a single responsibility principle is: every object in the system should have only one independent responsibility, and all objects are concerned with the completion of their own responsibilities. SRP single Responsibil

Before we learn the seven principles of object-oriented design, we should have a good understanding of basic encapsulation, inheritance and polymorphism, as well as the ability to encode abstract classes and interfaces, because design patterns are the integrated application

computing problems. But the method of gradual refinement cannot provide a system strategy or method to solve a specific problem. Sometimes, there is no top-down method for some problems. Structured program analysis is an effective method for small-scale programs, but it is often ineffective to promote it to large-scale system development, developers cannot use this method to easily reuse reusable components of previous programs. The abstract mechanis

the outside world.In General , process-oriented development is relatively easy, but it is not easy to deal with changes, object-oriented development is difficult, but it can better deal with the ever-changing world. Therefore, the modern software needs object-oriented devel