java design patterns interview questions

One of the interview summaries: Java handles linked list questions during the interview and java handles themThe linked list is often used in interviews. This article has referenced some other articles and added my own summary. Basically, every algorithm has been tested and

now requiredAdvantages:1, isolated the generation of specific classes, so that users do not need to care about when the physical product was created2, when multiple objects of an abstract product (such as P8, P9, P10 in the Huawei P-series phones) are designed to achieve the same abstract product, the client can be guaranteed to use only the same productDisadvantages:1. It is difficult to expand the abstract factory when adding new products.Abstract Factory class:　　　　　　　　　　　　　　　　　　　　　　　　Entity

that the coffee subclass and the tea sub-class implement both methods public class Coffee extends beverage {@Override protected void Putintocup () {System.out. println ( "Put the coffee in the Water Cup" protected void Addcondiments () {System.out.println ( "Add sugar and Milk" Public class extends Beverage { @Override protectedvoid Putintocup () { System.out.println ( "Put the coffee in the Water Cup"); @Override protectedvoid addcondiments () { Syst

Java Exception Handling interview questions, java exception handling questions 1. What are the differences between error and exception? An error indicates a system-level error. It is an internal error in the java Runtime Environme

customer {private String telephone;private int age;//get set Methodspublic vo ID Accept (Visitor Visitor) {Visitor.visitpersonalcustomer (this);}} User interface public interface Visitor {public void Visitenterprisecustomer (Enterprisecustomer Ec);p ublic void Visitpersonalcustomer (Personalcustomer pc);} A detailed interview with the visitors. To realize the function of customer request for service, this function is to imitate the original function,

policy pattern and the state pattern, and their purpose is different. A state pattern can help an object manage its state, whereas a policy pattern allows clients to choose different behaviors. Another difference that is not easy to see is who is going to drive behavior changes. In the policy mode, it is client-driven, which provides different policies for contextual information, whereas in state mode, state migration is managed by the context or by its own object. Similarly, if you are modifyi

pcname) {if("Dell". Equalsignorecase (Pcname))return NewDellcomputer (); if("Lenovo". Equalsignorecase (Pcname))return NewLenovocomputer (); return NULL; }}5). Computer Operation class /** * Computer Operation class, Call factory to create PC * [emailprotected] * December 25, 2017 */ public class Computeroperator { /** * Create PC * @param pcname computer name * @param Span style= "COLOR: #008000" > description computer description */ public void Createcomputer ( Stri

. NET domain driven design-first taste (one: questions, patterns, principles, tools, processes, frameworks, practices)2013-04-07 17:35:27Tags:. NET DDD Driver Design original works, allow reprint, please be sure to use hyperlinks in the form of the original source of the article, author information and this statement.

Linked list is often in the interview, this article refers to some other articles, together with the small series of their own summary, the basic algorithm has been tested and optimized.Algorithm Daquan (1) There are also some list problems in the single linked list, which will be sorted out in the future.* REFS:* http://blog.csdn.net/fightforyourdream/article/details/16353519* http://blog.csdn.net/luckyxiaoqiang/article/details/7393134 easy to handle

Logical Thinking interview questions-java backend interview-,-java backend(-1) Preface I recently participated in an interview and was very interested in the pen questions. I will retur

The so-called No recruit wins a recruit, practice a kung fu divides into internal strength and drilling. Drilling is like the moves, is the so-called 23 kinds of design patterns. But the internal strength, is the heart, that is the 6 kinds of laws. The light will drilling that is the huaquanxiutui, the internal strength is the realm. So many design

execution.Surround notification is one of the most common types of notifications. Most interception-based AOP frameworks, such as Nanning and JBOSS4, provide only surround notifications.The concept of pointcut (pointcut) and connection point matching is the key to AOP, which makes AOP different from other old technologies that simply provide interception functionality.The pointcut enables the location notification (advice) to be independent of the OO hierarchy. For example, a around notificatio

There are three types of design patterns: creation, structure, and behavior. Among them, the creation type is: 1. Singleton. Singleton mode: ensure that a class has only one instance, and provide a global access point to it. 2. Abstract Factory, Abstract Factory: provides an interface for creating a series of related or mutually dependent objects without specifying their specific classes. 3. Factory Method:

Java interview questions, java questionsCommon Java interview questions: What if the main method is declared as private? Answer: It can be compiled normally, but the system prompts "the

on request:　　Anyone who has used a servlet knows that, in addition to having a corresponding configuration in Web. xml, it is necessary to inherit an abstract class called httpservlet, and rewrite the Doget and Dopost methods (and, of course, just rewrite the service method).Many of the methods in the request object are used when the internal components interact with each other, such as setcomet, setrequestedsessionid, etc. (not listed here). These methods are not exposed externally, but must b

There are a lot of design patterns in php, but the design patterns are often mentioned in php interview questions. This article mainly introduces you to the design

Java exception architecture diagram and several interview questions, java architecture diagram questions 1. java exception Architecture The pink ones are checked exceptions, which must be captured by the try {} catch Block or dec

[Switch] Top 50 Java thread interview questions, javatop No matter whether you are a new programmer or veteran, you must have encountered thread problems during the interview. An important feature of Java is its built-in support for concurrency, which makes

original types, and to use the standard placeholders that are used in the JDK.7. Write a generic program to implement LRU caching?This is the equivalent of an exercise for people who like Java programming. To give you a hint, linkedhashmap can be used to implement a fixed-size LRU cache, which moves the oldest key-value pairs out of the cache when the LRU cache is full. Linkedhashmap provides a method called Removeeldestentry (), which is used by the

iteration is obtained, the client begins the iterative process and prints out all the aggregation elements.Iterative sub-pattern benefits Iterative sub-patterns simplify the aggregation of interfaces. The iteration has a traversal interface so that the clustered interface does not have to traverse the interface. Each clustered object can have one or more iteration sub-objects, and the iteration state of each iteration can be independent