classbuilder

class instance through a function call, and so on, to the type, the retention of the anonymous class actually causes the outer type to fail to be freed, causing a memory leak.For example, in the Joshua Bloch version of the Builder class implementation (see this blog post), we can use double brace initialization in the build () function to generate the product instance:1 Public classnutritionfacts {2 ...3 4 Public Static classBuilder {5 ...6

computer begins to assemble ...."); foreach(stringPartinch_parts) {Console.WriteLine ("Components"+ part +"already installed."); } Console.WriteLine ("computer's assembled."); } } /// ///Abstract Builder, this scenario is "assembler", which can also be defined as an interface ./// Public Abstract classBuilder {//Install CPU Public Abstract voidbuildpartcpu (); //Installed motherboard Public Abstract voidBuildpartmainboa

Item 2 encountered multiple constructor parameters consider builder Builder1. What is Builder?1 Public classBuilder_pattern {2 Private Final intP1;3 Private Final intP2;4 Private Final intP3;5 Private Final intP4;6 7 Public Static classbuilder{8 Private Final intP1;9 Private Final intP2;Ten One Private intP3=0; A Private intP4=0; - - PublicBuilder (intP1,intp2) { the This. p

method.Staticblock:a generated class, interface, or enum declaration: the Declaration of the class, interface, or enumeration to be generated. is to define the class interface or enumeration, define the time you need to give them a name, add the permission modifier whether the static abstract is final, add methods and other operationsSo there are static methods in this class Classbuilder Interfacebuilder EnumBuilder and anonymous inner class Anonymou

setter method. However, this approach has serious drawbacks: it may cause JavaBean to be in an inconsistent state, and thread safety is difficult to guarantee.The author proposes a third method: Builder. Instead of generating the desired object directly, the client invokes the constructor (or static factory) with all the necessary parameters to get a Builder object, and then the client invokes a setter-like method on the builder object to set each relevant optional parameter. Finally, the clien

hand, left and right foot. Unlike the factory model, the builder model constructs the product step-by-step under the control of the guiding person. To build a villain is to control the next step of construction. The creator pattern allows finer control over the build process, allowing finer control over the internal structure of the resulting product. A uml diagram of the builder pattern is given below to construct the villain as an example. For the customer, just know the guide can, through t

generate code in this method, the basic knowledge of annotation reflection generics is not described in detail here. @ Override public boolean process (Set Set, RoundEnvironment roundEnvironment) {// debug printing // System. out. println ("dependency>"); // System. out. println ("---------------------------------->"); Set BindViewElements = roundEnvironment. getElementsAnnotatedWith (BindView. class); // parse Element Map > AnalysisElementMap = new LinkedHashMap Elements = analysis

in multi-threaded operation is unsafe.The builder method guarantees both security and readability. Let's take a look at an example (nutrition table on food): Public classnutritionfacts {Private Final intservingsize; Private Final intservings; Private Final intcalories; Private Final intfat; Private Final intsodium; Private Final intcarbohydrate; Public Static classBuilder {//Required Parameters Private Final intservingsize; Private Final ints

() {returnname; } PublicString getaddress () {returnaddress; } Public Static classBuilder {Private intAge = 0; Private intSafeid = 0; PrivateString name =NULL; PrivateString address =NULL; 　 //Steps to build PublicBuilder (String name) { This. Name =name; } PublicBuilder Age (intval) { Age=Val; return This; } PublicBuilder Safeid (intval) {Safeid=Val; return This; } PublicBuilder Address (String val) {ad

1, the Java Builder mode is to instantiate an object with an inner class, avoid having too many constructors for a class, and it is easy to make mistakes if the constructor has default parameters.Public person (String name)Person (String name, int age)Person (String name, int age, Boolean sex)2. The request and response classes in the Android okhttp framework use Java Builder mode.3. Here is a small example:/** * @authorSunKing1927 November 2, 2015 * Java Builder Mode*/ Public classPerson {Priva

."); } Console.WriteLine ("product completion. "); } } //Product Engineer Public classBuilder {PrivateProduct Product =NewProduct (); //a module assembly Public voidBuildparta () {product. ADD ("Mobile motherboard + Accessories"); } //B Module Assembly Public voidBUILDPARTB () {product. ADD ("Mobile phone Case"); } //the products obtained PublicProduct geproduct () {returnproduct; } //assembled in

. Construct (); Console.readkey (); } } /// ///Creating abstract Classes/// Public Abstract classBuilder {protectedPeople people =Newpeople (); Public Abstract voidSetcountry (); Public Abstract voidSetspeak (); Public Abstract voidSetskincolor (); PublicPeople GetResult () {returnpeople; } } /// ///Objects that are created are different locally,/// Public classpeople { Publicpeople () {Console.Write

Command mode: Encapsulate the request, parameterize the client with different requests, queue the request or log the request, and revoke the operation.1 namespacedesignmodel. Command mode2 {3 Abstract classCommand4 {5 protectedexecer exe;6 PublicCommand (execer execer)7 {8 This. exe =Execer;9 }Ten Abstract Public voidexeccommand (); One } A - classCommandone:command - { the PublicCommandone (Execer execer):Base(

The builder pattern is when the algorithm that creates the complex object should be independent of the part of the object and the mode in which they are assembled.Importjava.util.LinkedList;Importjava.util.List;/*** Created by Hero on 16-4-3.*/ Public classProduct {PrivatelistNewLinkedlist(); Public voidAdd (String part) {Parts.add (part); } Public voidShow () { for(String p:parts) {System.out.print (P+ "\ T"); } System.out.println (); }}/*** Created by Hero on 16-4-3.*/ Public Abstract

: Han * @date: June 23, 2016 PM 8:18:45*/ Public Abstract classBuilder { Public Abstract voidBuildparta (); Public Abstract voidBUILDPARTB (); Public AbstractProduct GetResult ();}Concrete Builder Class PackageCom.csdhsm.pattemdesign.builder;/*** @Title: Concretebuilder1.java * @Description: Concrete Construction 1 *@author: Han * @date: June 23, 2016 PM 8:19:23*/ Public classConcreteBuilder1extendsBuilder {PrivateProduct Product =NewProduct ();

, and then call the setter method to set each necessary parameter.This makes it easy to create an instance, and the resulting code is easier to read because the setter's method name will tell you which parameter is set.Disadvantage: The construction process is divided into several calls, in the construction process can not guarantee the consistency of JavaBean.3.Builder modeInstead of generating the desired object directly, let the customer call the constructor with all the necessary parameters,

voidShow () { for(inti=0; Ii) System.out.println (Sequence.get (i)); } }Abstract classbuilder{Abstract voidBuildhead (); Abstract voidBuildbody (); Abstract voidBuildhand (); Abstract voidBuildfeet (); Abstractproduct GetResult ();}classFatbuilderextendsbuilder{Product P=Newproduct (); @Overrideprotected voidBuildhead () {P.add ("Fat head."); } @OverridevoidBuildbody () {P.add ("Fat Man Body"); } @OverridevoidBuildhand () {P.add ("Fat hands."); }

builder pattern is to centralize the various products to manage, to create composite objects, so-called composite objects that refer to a class that has different properties, in fact the builder pattern is the combination of the previous abstract factory pattern and the last Test. Let's look at the code:6. Code ExamplesAs before, a sender interface, two implementation classes MailSender and Smssender. At last:Implementation code:First, create a common interface for both:publicinterface Sender {

= Builder.age; sex = Builder.sex; High = Builder.high; face = Builder.face; Weight = builder.weight; foot = Builder.foot; } Public Static classBuilder {PrivateString name;Private intAgePrivate intSexPrivate intHighPrivate intFacePrivate intWeightPrivate intFoot PublicPersonBuild() {return NewPerson ( This); } PublicBuilderSetName(String name) { This. name = name;return This; } PublicBuilderSetage(intAge) { This. Age =

)); } Console.WriteLine ("assemble "{0}" computer finished! ", Band); } }Next look at the builder role, the computer assembler abstract class./// ///the builder (simulated machine process) can also be implemented via the interface///The director does not care about the details of the specific assembly, so the specific assembly detail method is marked as protected/// Public Abstract classBuilder {/// ///assembling the host///