prototype design pattern real world example

"); Acc.setpassword ("123"); Psp1.setaccount (ACC); Psp1.setcolor ("Red"); Psp1.setprice (1600.0); Psp1.setram (8); System.out.println ("Millet:" + psp1.tostring ()); PSP PSP2 = (PSP) Psp1.clone (); System.out.println ("Xiao Ming:" + psp2.tostring ()); System.out.println ("Xiaoming modifies memory and account =========="); Psp2.getaccount (). SetName ("Xiaoming"); Psp2.getaccount (). SetPassword ("555");

prototype class or interface, which has only one clone (), and all the concrete prototype classes implement the method and define the specific behavior of replicating itself. A clone method that invokes a specific prototype object in the client can replicate the prototype object into a new object. Figure 1

time · Changing objects, this is the common advantage of combinatorial patterns · Reduce the number of subclasses · Dynamically configuring Applications with classes The biggest disadvantage of prototype is that it can be difficult to implement a clone operation in some languages, especially if the amount of circular references is included. Next, continue to use the example in the previous article, de

This time for you to bring PHP prototype design patterns use case analysis, PHP prototype design patterns used in the attention of what, the following is the actual case, together to see. First, what is the prototype design mode

Prototype modePrototype mode (Prototype pattern) is used to create duplicate objects while guaranteeing performance. This pattern implements a prototype interface that is used to create clones of the current object. This pattern i

Prototype of Design Pattern The object created by the factory method is a new object, and its attributes are generally default. What I understand is that the prototype operation method creates a clone body, which can be considered as two steps: 1. creates an object. 2. copy the attributes of the created object as the c

Implementation of design prototype design pattern Implementing the Prototype design pattern Download this article code When I create an instance of a class that is complicated, we

- - 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; -

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

words, a deep copy copies the objects that are referenced by the object being copied again. 1. Shallow copy (Shallow clone) UML:This example is when we are in charge of the mail. Do not copy attachments (Attachment)Again, all Java classes inherit the Java.lang.Object, and do not write extends Object in the code.Super.clone () is required to invoke the Clone () method;2. deep Copy (Deep clone) UML:"Shallow Clone" Public Object Clone () { null;

Prototype mode is also a created design pattern, creating new objects by copying prototypes, understanding that prototype patterns must understand shallow and deep replication in Java. Replication is also known as cloning. deep copies will occur with 8 of the basic types in Java and their package types, plus the string

backgroundSometimes you will find that the reference type is also very annoying, because at some point you may need two of the same reference object, one for backup, one to continue operation, but continue operation that does not affect my backup that, this time the trouble comes, two references if point to the same memory space object, Then modify one, and the other will certainly change.1. Intention to useInstead of re-initializing the object, you dynamically get the state of the object runtim

instance to specify the type of object to be created, that is, our daily life. If we want to generate a daily life pattern for many days, you only need to assign values to the objects created by the prototype, instead of having to create an instance object every time. This will greatly save the various resources used to create objects. Next, let's take a look at how to implement it. Using system; using s

automatically generates a constructor called the default copy constructor. By default, the copy constructor uses the shortest COPY method. If the class contains dynamic data members, you must use the deep COPY method to implement the copy constructor. Otherwise, when the object is destroyed, the destructor of the two objects will release the same memory twice, resulting in a runtime error. // Prototype. h # include View code References 1

: This article mainly introduces the php design pattern learning series (7)-prototype objects. if you are interested in PHP tutorials, refer to it. Disclaimer: Cheng Jie, author of this series of blog references "big talk Design Mode. Use a prototype instance to specify the

=NewConcreteprototype ("Prototype");5Prototype Pro2 =(Prototype) Pro.clone ();6 System.out.println (Pro.getname ());7 System.out.println (Pro2.getname ());8 }9 Ten}1 /**2 * Declares a clone's own interface3 * @author 4 *5 */6 Public classPrototypeImplementscloneable {7 8 PrivateString name;9 Ten Public voidsetName (String name) { One This. Name =name; A } - -

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