Java's road to God

Since the inspirational way in java to go further, we must understand the path of java. Look at Figure

　　image.png
　　more refined details are as follows

　　a: Programming Fundamentals
　　either C or C ++, Java or whether it is PHP, wanted to be a qualified programmer, basic data structures and algorithms still have the basis. The following articles from idea to realization, as you tease out common data structures and algorithms classic.

　　1-1 common data structure

　　an array, linked list, heap, stack, queue, Hash tables, binary trees, etc.

　　1-2 ALGORITHM

　　Algorithm Analysis calculated time complexity and spatial complexity

　　idea of the algorithm: recursive, recursive, exhaustive, greedy, divide and conquer, dynamic programming, iteration, branching boundary

　　1-3 classical algorithm

　　classic sort: insertion sort, bubble sort, quick drain (partition exchange sort), direct selection sort, heap sort, merge sort

　　classic look: sequential search, binary search, binary sort tree lookup

　　1-4 advanced data structures

　　+ / B- number B, red-black trees, etc. FIG.

　　1-5 advanced algorithm

　　depth-first search, breadth-first search graph, topological sorting, the Dijkstra algorithm (single source shortest path), Huffman coding, Euclidean algorithm, minimum spanning tree and other

　　two: Java language foundation
　　was born more than twenty years in the Java language, with its cross-platform, object-oriented, distributed computing characteristics suitable for wide range of applications on Web sites, mobile devices, desktop applications, and has been for many years ranked the forefront of the list of programming languages TOBIE, more recently, Triumphed. Java What are excellent and distinctive place first of all must be clear.

　　2-1 basic grammar

　　Overloaded operators, the program flow control Java syntax, constants and variables, variable scope, and a method of, and all the basic data types packaging

　　2-2 Important: collection classes

　　Collection and various List, Set, Queue, Map implementation and integration relations and realize the principle of

　　collections and Arrays

　　2-3 other JavaAPI

　　String and StringBuffer, system and Runtime classes, Date and DateFomat class

　　java.lang package

　　java.util package (collections system, regular expressions, zip , and time, random numbers, attributes, resources, etc. Timer)

　　classes in java.math package

　　java.net package

　　java.text package (various format etc.)

　　the java.security package

　　2-4 object-oriented, oriented interfaces

　　object three properties: encapsulation, inheritance and polymorphism, advantages and disadvantages of

　　how to design classes, class design principle

　　this keyword, final keyword, keyword static

　　instance of the process object of

　　rewriting and overloaded methods; parameter transfer process and a method

　　constructors

　　internal classes, abstract classes, interfaces

　　reference conversion between polymorphisms object (and subclasses of the parent class, subclass parent carton ), Abstract classes and interfaces in a multi-state application

　　2-5 JVM memory model, garbage

　　2-6 about the exception

　　Throwable / Error / Exception, Checked Exception vs. Unchecked Exception, unusual catch and throw, catch an exception principle, finally use

　　2-7 multithreading

　　concept of threads and processes of

　　how to create a multi-threaded program, the security thread, communication between threads

　　thread synchronization

　　analysis deadlock problems

　　thread pool

　　2-8 IO

　　java.io package, understanding IO system based on features and design ideas of the pipe model and the common use of IO class occasion.

　　File and related classes, and the OutputStream InputStream byte stream, a character stream Reader and Writer, and the conversion of the corresponding flow and the buffer flow pipe flows, and a character byte, packet stream, and using conventional packaging

　　Analysis IO performance

　　2-9XML

　　familiar SAX , DOM and JDOM advantages and disadvantages and be able to use one of them to complete XML parsing and content processing; principles of these types of analytical methods

　　2-10 advanced features

　　reflective, agents, generics, enumerations, Java regular expressions

　　2 -11 network programming

　　network communication protocols and principles applicable scenario, Socket programming works wEB server

　　2-11 JDK1.5, JDK1.6, JDK1.7, JDK1.8 each version than the earlier version which added a new characteristics, which were lifting

　　three: database-related
　　speaking in front of the data structures, database simple terms is like an electronic filing cabinet, according to certain data structure to organize, store and manage data warehouses.

　　3-1 theoretical basis of

　　design principles and paradigms database

　　transactions (ACID, working principle, transaction isolation level, locks, transaction propagation mechanism)

　　3-2 advantages and disadvantages of various databases, using the scene analysis

　　MySQL / SQLServer / Oracle and a variety of NoSQL (Redis, MongoDB, Memcached, HBase , CouchDB , etc.)

　　3-2 SQL statements

　　database creation, distribution rights, to create a table, CRUD, connections, sub-query

　　triggers, stored procedures, transaction controls

　　3-3 optimized

　　indexing works and suitable, large table query optimization, multi-table join query optimization, optimization subqueries

　　3-4 sub-libraries, sub-table, backup, migration

　　import, export, sub-libraries, sub-table, cold standby hot backup, the backup master, dual hot standby, longitudinal expansion, scale

　　3-5 JDBC

　　use different types of JDBC connection, Statement, PreparedStatement, CallableStatement , ResultSet like

　　connection pool (configuration used to realize the principle)

　　the ORM, the DAO

　　four: JavaWeb core technologies (including a front end portion)
　　Html5 / Css / JS native / the jQuery

　　Ajax (cross-domain, etc.)

　　the JSP / the JavaBean / the Servlet / the EL / the JSTL / TagLib

　　the JSF

　　the JSON

　　the EJB

　　sequence And de-serialization

　　The rules engine

　　search engine

　　template engine

　　caches

　　authentication

　　test

　　cluster

　　persistent

　　generating static pages of technical

　　high-performance

　　security

　　affairs JTA

　　else you need to know, such as: management JMX, security JCCA / JAAS, integrated JCA, communication JNDI / JMS / JavaMain / JAF, SSI technology

　　five, the main frame and tool
　　Struts1 / the Struts2

　　the Spring (the IoC, the AOP etc.), SPRINGMVC

　　persistence: Hibernate / MyBatis

　　log: Log4j

　　unit testing: JUnit

　　message queue: ActiveMQ, RabbitMQ other

　　load balancing: the Nginx / HaProxy

　　the Web server: Tomcat, JBoss, Jetty, Resin, WebLogic, WebSphere , etc.

　　communication: WebService (cxf of soap, restful protocol)

　　cache: Redis, Memcached

　　workflow: Activity, JBPM

　　search engine: lucene, solr based lucene package

　　template engine: Velocity, FreeMaker

　　large data : Hadoop (HDFS and MapReduce)

　　Build tools: Ant / Maven

　　six, JavaWeb system design and architecture
　　Java design patterns

　　JAVA and UML modeling

　　Service-Oriented Architecture: SOA / SCA / ESB / OSGI / EAI, micro service

　　-oriented architecture resources: ROA / REST

　　-oriented cloud architecture: COA / Saas / cloud computing

　　large site load balancing, system calls classy

　　seven, More
　　troubleshooting capability:

　　it should be based on the cause of abnormal information relatively quickly locate the problem and the approximate location of the

　　ability to optimize

　　code specifications, code management:

　　have their own code norms, good code readability

　　wide range of knowledge:

　　to understand a variety of network products and features, to understand a variety of middleware, to know where the pit, well versed in the advantages and disadvantages of various technical solutions, understand and integrate various resources to achieve optimal .. .. understand various technologies and application scenarios, there is enough work experience to solve all kinds of wonderful problems encountered in the integration of

　　technology management / technical Director:

　　product management and project management, team building, team upgrade

　　CTO:

　　development strategy

　　summary: current me and my goal there is a big gap, I hope every time over a period of time to look at these things to see To see if they are a step forward. Daren God java and long road, at the foot of the road, come on.
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