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Let's talk about your personal situation first , College graduate ,16 In, he entered an outsourcing company in Hunan through school recruitment , Dry close 3 Year CRUD, in the beginning of this year , I feel like I can't go on like this , Staying in a comfortable environment for a long time will make a person degenerate ! And I have worked in an enterprise for three years CRUD, Has made me less enterprising , Yes 3 My girlfriend broke up with me because of my mentality and salary . therefore , I decided to change the status quo , Look at this year's gold, silver and four !
At the beginning of preparation , I've been blindfolded ,3 Year CRUD Let my technology without a trace of progress , Only my age has been promoted ...
no way out , I found my mentor , As his capable disciple , After he learned about me （ Almost Java Foundation start ）, Just throw me a study note ：“ Go ahead , Here's everything you need , Don't come to me , I'm ashamed !”.
Now let's see how powerful this note is !（ At first I thought my tutor was bragging , As a result, I knelt directly to my tutor after learning ...）
《Java Comprehensive analysis of intermediate and advanced core knowledge 》 Total pages of this document ：524 page . It is divided into eight parts, and each part explains the core knowledge points in detail .
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Part I Solid Java Basics （Java Basics + container + Concurrent +JVM）
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Part II Network knowledge （ Computer network technology +HTTPS Medium TLS）
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Part III Linux
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Part IV Data structure and algorithm
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Part V database （MySQL+Redis）
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Part VI system design （RestFul API+ Common framework + Authentication authorization + Distributed + Large website architecture + Microservices ）
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Part VII Must know tool （Git+Docker）
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Part VIII Interview guide （ How should I write my resume + How to prepare for an interview + My learning method ）
Because the whole notes are comprehensive , Quite a lot
, Here are just some screenshots of the material , If necessary, obtain the information mentioned in the text “Java Comprehensive analysis of intermediate and advanced core knowledge ” My friend Forward this article directly , Free access to the end of the article ~
Part I Java
( one ). Basics
1. Java basic skill
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Java introduction （ Basic concepts and common sense ）
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Java grammar
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Basic data type
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method （ function ）
2. Java object-oriented
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Classes and objects
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Three characteristics of object oriented
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Modifier
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Interfaces and abstract classes
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Other important knowledge points
3. Java core technology
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aggregate
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abnormal
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Multithreading
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Documents and I\O flow
( two ). container
1. ArrayList
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ArrayList brief introduction
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ArrayList Core source code
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ArrayList Source code analysis
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ArrayList classic Demo
2. LinkedList
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brief introduction
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Internal structure analysis
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LinkedList Source code analysis
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LinkedList Class common method test
3. HashMap
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HashMap brief introduction
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Analysis of underlying data structure
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HashMap Source code analysis
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get method
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resize method
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HashMap Common method test
( three ). Concurrent
1. Concurrent container
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JDK Summary of concurrent containers provided
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ConcurrentHashMap
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CopyOnWriteArrayList
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ConcurrentLinkedQueue
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BlockingQueue
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ConcurrentSkipListMap
2. Thread pool
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Benefits of using thread pools
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Executor frame
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( important )ThreadPoolExecutor Class introduction
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( important )ThreadPoolExecutor Use example
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Detailed explanation of several common thread pools
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ScheduledThreadPoolExecutor Explain in detail
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Thread pool size determination
3. Optimistic lock and pessimistic lock
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What is pessimistic lock and optimistic lock
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Two common implementations of optimistic locks
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Disadvantages of optimistic lock
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CAS And synchronized Usage scenarios for
4. Atomic
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Atomic Introduction to atomic class
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Basic type atomic class
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Array type atomic class
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Reference type atomic class
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Object's attribute modification type atomic class
5. AQS
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AQS Brief introduction
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AQS principle
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Semaphore( Semaphore )- Allow multiple threads to access at the same time
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CountDownLatch （ Countdown timer ）
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CyclicBarrier( Circular fence )
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ReentrantLock and ReentrantReadWriteLock
( four ). JVM
1. Java Memory area
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summary
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Runtime data area
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HotSpot Exploration of virtual machine objects
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Key supplementary contents
2. JVM garbage collection
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open JVM Mysterious veil of memory allocation and recycling
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The object is dead ?
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Garbage collection algorithm
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garbage collector
3. JDK Monitoring and troubleshooting tools
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JDK Command line tools
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JDK Visual analysis tool
4. Class file structure
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summary
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Class Document structure summary
5. Class loading process
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Class loading process
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uninstall
6. Class loader
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Review the class loading process
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Class loader summary
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Parents Delegation Model
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Custom class loader
two , network
( one ). Computer network knowledge
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Computer overview
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physical layer
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data link layer
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network layer
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Transport layer
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application layer
( two ). HTTPS Medium TLS
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SSL And TLS
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Understanding from the perspective of network protocol HTTPS
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Understanding from the perspective of cryptography HTTPS
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RSA Simple example
three ,Linux
( one ). Start with understanding the operating system
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Introduction to operating system
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Simple classification of operating systems
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Operating system kernel
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User state and kernel state of operating system
( two ). Probe into Linux
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Linux brief introduction
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Linux Birth introduction
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Linux Classification of
( three ) Linux File system overview
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Linux Introduction to file system
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Inode
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File type and directory structure
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Linux Directory tree
( four ) Linux Basic command
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Directory switching command
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Operation command of directory ( Add, delete, modify and query )
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Operation command of file ( Add, delete, modify and query )
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Operation commands for compressed files
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Linux Permission command for
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Linux user management
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Linux Management of system user groups
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Other common commands
four , Data structure and algorithm
( one ). data structure ( Bloom filter )
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What is a bloom filter ?
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Introduction to the principle of Bloom filter
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Bloom filter usage scenario
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adopt Java Programming manual implementation of Bloom filter
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utilize Google GPl Guava Bloom filter in
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Redis Bloom filter in
five , database
( one ). MySQL
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basic operation
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Database operation
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Table operation
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Data operation
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Character set encoding
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data type ( Column type )
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Column properties ( Column constraint )
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Table building specification
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SELECT
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UNION
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Subquery
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join query (join)
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TRUNCATE
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Backup and restore
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view
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affair (transaction)
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Lock table
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trigger
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SQL programming
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stored procedure
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User and rights management
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Table maintenance
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miscellaneous
( two ). Redis
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5 Basic data structure
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Jump table
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In depth exploration of distributed locks
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Redlock Distributed lock
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How to make a reliable distributed lock ,Redlock Is it really feasible
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magical HyperLoglog Solve statistical problems
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Billion level data filtering and bloom filter
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GeoHash Find people nearby
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Persistence
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Publish subscribe and Stream
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[ colony ] Introductory practical tutorial
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Redis data type , code , Underlying data structure
six , system design
( one ). RestFul API
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Important concepts
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REST interface specification
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HATEOAS
( two ). Common framework
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Spring common problem
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Spring Common notes
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Spring affair
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Spring IOC and AOP Explain in detail
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Spring in Bean Scope and lifecycle of
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SpringMVC Detailed explanation of working principle
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Spring Which design patterns are used in ?
( three ). Authentication authorization (JWT,SSO)
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JWT Analysis of advantages and disadvantages of identity authentication and solutions to common problems
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SSO Single sign on
( four ). Distributed
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Introduction to distributed related concepts
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Dubbo
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Message queuing is actually very simple
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RabbitMQ
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RocketMQ
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Kafka
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API gateway
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Distributed ID
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What are the current limiting algorithms ?
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Zookeeper
( five ). Large website architecture
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How to design a high availability system ? What should be considered ?
( six ). Microservices
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Spring Cloud
seven , Must know tool
( one ). Git
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version control
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know Git
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Git Getting started with
( two ). Docker
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Cognitive container
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Let's talk again Docker Some concepts of
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container VS virtual machine
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Docker Basic concepts
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Common commands
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Build Ship and Run
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Take a brief look Docker Underlying principle
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summary
eight , Interview guide
（ one ）. How to write a programmer's resume
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Why is a resume important ?
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Here are some things you must know
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Two rules that must be understood
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How to write the project experience ?
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How to write professional skills ?
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Notes for typesetting
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Other small tips
（ two ）. How to prepare for an interview
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How to obtain interview opportunities in large factories ?
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Preparation before interview
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Resume after the interview
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How to learn ? Is it necessary to learn various frameworks ?
（ three ）. Java Learning route and method recommendation
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Java Basics
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Operating system and computer network
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Data structure and algorithm
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Front end knowledge
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MySQL
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Common tools
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Common framework
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Simple use of multithreading
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Distributed
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In depth learning
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Microservices
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summary
Write at the end
I didn't even fully understand the above knowledge points in this note , Only mastered 80%, Can complete a substantial salary increase , Although I gave up all my rest time in the process of learning , I even fish and study at work （ Sitting for a long time without exercise , Even got hemorrhoids ...）, But I think it's worth it , I died 3 Months , The harvest is not only close to a month 9k Salary increase , There is also one who studies hard , Positive attitude !
Gold, silver and four are more than half , Are there many friends like me before , be satisfied with the existing state of affairs and reluctant to move forward , Boiled frog in warm water , Delay in making changes , Has been working in a company CRUD, When you want to make some changes, the lack of time to find yourself is wasted CRUD It's full . Working for a few years only increases your age , Technology has been stuck in the day of joining the company , Even a little backward .
Dare not raise salary , I'm not eligible for a raise . People younger than you have better skills than you , There is only one way left for you ： Be laid off !
I hope you can always keep a positive heart , I always believe in one thing ： Opportunities are always reserved for those who are prepared .
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