prototype design pattern

OverviewThe prototype pattern is designed to solve some unnecessary object creation processes. When the Cloneable interface is available in the Java JDK, the prototype schema becomes unusually simple. Although the introduction of cloneable has become simpler, there are some things that need to be noted and noticed. The text will explain these precautions in detai

classmainclass{ Public Static voidMain (string[] args)throwsclonenotsupportedexception {Person person =NewPerson (); Person.setnanme ("Jeff Lee"); Person.setage (20); Person.setsex ("Boy");//Person person2 = person; reference same change same time changePerson Person2 = Person.clone ();//refer to different content and also change theirSystem.out.println (Person2.getnanme ()); Person2.setnanme ("Jeff Lee 2"); System.out.println (Person2.getnanme ()); System.out.pri

//user.name = "Cloner name"; A returnuser; - } -}Cons: 1. The cloning method requires an overall consideration of the function of the class, which is not difficult for a new class, but not necessarily easy for existing classes, especially when a class reference does not support serialization of indirect objects, or when a reference contains a looping structure. 2, must implement the Cloneable interface. 3, Escape from the constraints of the constructor function.usage Scenari

Prototype { Abstract function cloned (); } /** Concrete Prototype class * Class Plane */ class Plane extends Prototype { Public $color; function Fly () { Echo "The plane flies, flies!""; } function cloned () { return Clone $this ; } } Client Test Code: [PHP] View plain copy print? Header ("Content-type:text/html;

The prototype pattern belongs to the creation pattern of the object, by giving a prototype object to indicate the type of object to create, and then creating more objects of the same type with the method of copying the prototype object. is to give you an existing object that

Prototype prototype mode is a creation design pattern, prototype mode allows an object to create another customizable object without knowing the details of how to create it, by passing a prototype object to the object to be create

The advantages and application scenarios of prototype modeCreating an object using the prototype schema is much better performance than a direct new object, because the Clone method of the object class is a local method that directly operates in-memory binary streams, especially when copying large objects, where performance is significantly different.Another benefit of using

= (enterpriseorder) Order; e2.setenterprisename (e1.getenterprisename (); e2.setproductid (e1.getproductid (); e2.setorderproductnum (1000 ); // then set it to neworderneworder = e2;} // 2.2 the original order is retained and the quantity is reduced by 1000order. setorderproductnum (Order. getorderproductnum ()-1000); // then, the service function is processed. If it is omitted, print the output and check the system. out. println ("split to generate order =" + neworder );}4. Solution Do you thi

- - voidsetobj (obj obj) { - This. obj =obj; - } - in - @Override to PublicPrototype Mclone () { + //TODO auto-generated Method Stub -Prototype Prototype =NULL; the //call the new constructor method *Prototype =NewConcreteprototype (Getobj ()); $ Prototype.setid (GetId ());Panax Notoginseng returnprototype; -

, value in pairs (object) does New_table[_copy (index)] = _copy (value) end return setmetatable (New_table, Getmetatable (object)) end return _copy (object) End--------Experience-------Experience = Class () function Experience:ctor () Self.timearea = Nilself.company = Nilendfunction experience:workexperience (Timearea, company) Self.timearea = TimeAreaself.company = Companyend--------Resume-------resume = Class () function Resume:ctor (name) Self.name = Nameself.sex = Nilself.age = Nilse Lf.

objectWhen an object requirement is provided to other object access, and each caller may need to modify its value, consider using the prototype schema to copy multiple object callers.In real-world projects, prototype patterns rarely appear alone, typically in conjunction with Factory mode patterns, creating an object by using clone, and then appearing together with the factory method

clone the body: class RouTi implements Cloneable { private String head; private String body; private String type; public RouTi(String head, String body, String type) { this.head = head; this.body = body; this.type = type; } @Override protected RouTi clone() { RouTi rt = null; try { rt = (RouTi) super.clone(); } catch (CloneNotSupportedException e) { rt = new RouTi(this.head, this.body, this.type); }

Prototype mode (PROTOTYPE): Specifies the kind of object created with the prototype instance, and creates a new object by copying the prototypes. The prototype pattern is actually creating another customizable object from one object without needing to know the specifics of t

There are 23 modes in the design pattern. This is just for one purpose: decoupling + decoupling + decoupling ... ( cohesion poly-low coupling satisfies the opening and closing principle)Introduced:Use the prototype instance to specify the kind of object to create and create a new object by copying the prototypes.Why use proto