The final step is to provide abuild()method in the builder class that will return the Object needed by client program. For this we need to have a private constructor in the Class with Builder class as argument. Here is the sample builder pattern example code where we have a Computer class...
1.单例模式(Singleton Pattern) 2.工厂模式(Factory Pattern) 3.抽象工厂模式(Abstract Factory Pattern) 4.建造者模式(Builder Pattern) 5.原型模式(Prototype Pattern) 结构型设计模式 1.适配器模式(Adapter Pattern) 2.组合模式(Composite Pattern) 3.代理模式(Proxy Pattern) 4.享元模式(Flyweight Pattern) 5....
4. Builder Pattern The builder pattern was introduced to solve some of the problems with factory and abstract Factory design patterns when the object contains a lot of attributes. This pattern solves the issue with a large number of optional parameters and inconsistent state by providing a way to...
Builder Design Pattern in Java - Class Diagram Code for the classes shown in Java Example’s Class Diagram //Interface - Document.java public interface Document{ } //Class PDFDocument.java public class PDFDocument implements Document{ //attributes for holding the PDFDocument } //Class XMLDocument...
建造者模式(Builder Pattern)使用多个简单的对象一步一步构建成一个复杂的对象。 这种类型的设计模式属于创建型模式,它提供了一种创建对象的最佳方式。 一个Builder 类会一步一步构造最终的对象。该 Builder 类是独立于其他对象的。 介绍 意图: 将一个复杂的构建与其表示相分离,使得同样的构建过程可以创建不同的表...
1> Simple Example package edu.xmu.oop.builder; public class Person { private final String lastName; // required private final String firstName; // required private final String middleName; // optional private final String salutation;// optional ...
package com.example.designpattern.builder;public class Client {public static void main(String[] args) {Builder builder = new ConcreteBuilder();Director director = new Director(builder);Product product = director.construct();product.show();}} ...
I find it hard to use the above example in real-life programming and applications. The above process is very similar (not exactly) to theabstract factory pattern, where we find a factory (or builder) for a specific type of object, and then the factory gives us a concrete instance of tha...
在GoF的《Design Patterns: Elements of Reusable Object-Oriented Software》中给出了三类(创建型[对类的实例化过程的抽象化]、结构型[描述如何将类或对象结合在一起形成更大的结构]、行为型[对在不同的对象之间划分责任和算法的抽象化])共23种设计模式,包括:Abstract Factory(抽象工厂模式),Builder(建造者模式)...
Applicability:Use the Builder pattern when the algorithm for creating a complex object should be independent of the parts that make up the object and how they're assembled the construction process must allow different representations for the object that's constructed ...