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 .
*
Part I Solid Java Basics （Java Basics + container + Concurrent +JVM）
*
Part II Network knowledge （ Computer network technology +HTTPS Medium TLS）
*
Part III Linux
*
Part IV Data structure and algorithm
*
Part V database （MySQL+Redis）
*
Part VI system design （RestFul API+ Common framework + Authentication authorization + Distributed + Large website architecture + Microservices ）
*
Part VII Must know tool （Git+Docker）
*
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
*
Java introduction （ Basic concepts and common sense ）
*
Java grammar
*
Basic data type
*
method （ function ）
2. Java object-oriented
*
Classes and objects
*
Three characteristics of object oriented
*
Modifier
*
Interfaces and abstract classes
*
Other important knowledge points
3. Java core technology
*
aggregate
*
abnormal
*
Multithreading
*
Documents and I\O flow
( two ). container
1. ArrayList
*
ArrayList brief introduction
*
ArrayList Core source code
*
ArrayList Source code analysis
*
ArrayList classic Demo
2. LinkedList
*
brief introduction
*
Internal structure analysis
*
LinkedList Source code analysis
*
LinkedList Class common method test
3. HashMap
*
HashMap brief introduction
*
Analysis of underlying data structure
*
HashMap Source code analysis
*
get method
*
resize method
*
HashMap Common method test
( three ). Concurrent
1. Concurrent container
*
JDK Summary of concurrent containers provided
*
ConcurrentHashMap
*
CopyOnWriteArrayList
*
ConcurrentLinkedQueue
*
BlockingQueue
*
ConcurrentSkipListMap
2. Thread pool
*
Benefits of using thread pools
*
Executor frame
*
( important )ThreadPoolExecutor Class introduction
*
( important )ThreadPoolExecutor Use example
*
Detailed explanation of several common thread pools
*
ScheduledThreadPoolExecutor Explain in detail
*
Thread pool size determination
3. Optimistic lock and pessimistic lock
*
What is pessimistic lock and optimistic lock
*
Two common implementations of optimistic locks
*
Disadvantages of optimistic lock
*
CAS And synchronized Usage scenarios for
4. Atomic
*
Atomic Introduction to atomic class
*
Basic type atomic class
*
Array type atomic class
*
Reference type atomic class
*
Object's attribute modification type atomic class
5. AQS
*
AQS Brief introduction
*
AQS principle
*
Semaphore( Semaphore )- Allow multiple threads to access at the same time
*
CountDownLatch （ Countdown timer ）
*
CyclicBarrier( Circular fence )
*
ReentrantLock and ReentrantReadWriteLock
( four ). JVM
1. Java Memory area
*
summary
*
Runtime data area
*
HotSpot Exploration of virtual machine objects
*
Key supplementary contents
2. JVM garbage collection
*
open JVM Mysterious veil of memory allocation and recycling
*
The object is dead ?
*
Garbage collection algorithm
*
garbage collector
3. JDK Monitoring and troubleshooting tools
*
JDK Command line tools
*
JDK Visual analysis tool
4. Class file structure
*
summary
*
Class Document structure summary
5. Class loading process
*
Class loading process
*
uninstall
6. Class loader
*
Review the class loading process
*
Class loader summary
*
Parents Delegation Model
*
Custom class loader
two , network
( one ). Computer network knowledge
*
Computer overview
*
physical layer
*
data link layer
*
network layer
*
Transport layer
*
application layer
( two ). HTTPS Medium TLS
*
SSL And TLS
*
Understanding from the perspective of network protocol HTTPS
*
Understanding from the perspective of cryptography HTTPS
*
RSA Simple example
three ,Linux
( one ). Start with understanding the operating system
*
Introduction to operating system
*
Simple classification of operating systems
*
Operating system kernel
*
User state and kernel state of operating system
( two ). Probe into Linux
*
Linux brief introduction
*
Linux Birth introduction
*
Linux Classification of
( three ) Linux File system overview
*
Linux Introduction to file system
*
Inode
*
File type and directory structure
*
Linux Directory tree
( four ) Linux Basic command
*
Directory switching command
*
Operation command of directory ( Add, delete, modify and query )
*
Operation command of file ( Add, delete, modify and query )
*
Operation commands for compressed files
*
Linux Permission command for
*
Linux user management
*
Linux Management of system user groups
*
Other common commands
four , Data structure and algorithm
( one ). data structure ( Bloom filter )
*
What is a bloom filter ?
*
Introduction to the principle of Bloom filter
*
Bloom filter usage scenario
*
adopt Java Programming manual implementation of Bloom filter
*
utilize Google GPl Guava Bloom filter in
*
Redis Bloom filter in
five , database
( one ). MySQL
*
basic operation
*
Database operation
*
Table operation
*
Data operation
*
Character set encoding
*
data type ( Column type )
*
Column properties ( Column constraint )
*
Table building specification
*
SELECT
*
UNION
*
Subquery
*
join query (join)
*
TRUNCATE
*
Backup and restore
*
view
*
affair (transaction)
*
Lock table
*
trigger
*
SQL programming
*
stored procedure
*
User and rights management
*
Table maintenance
*
miscellaneous
( two ). Redis
*
5 Basic data structure
*
Jump table
*
In depth exploration of distributed locks
*
Redlock Distributed lock
*
How to make a reliable distributed lock ,Redlock Is it really feasible
*
magical HyperLoglog Solve statistical problems
*
Billion level data filtering and bloom filter
*
GeoHash Find people nearby
*
Persistence
*
Publish subscribe and Stream
*
[ colony ] Introductory practical tutorial
*
Redis data type , code , Underlying data structure
six , system design
( one ). RestFul API
*
Important concepts
*
REST interface specification
*
HATEOAS
( two ). Common framework
*
Spring common problem
*
Spring Common notes
*
Spring affair
*
Spring IOC and AOP Explain in detail
*
Spring in Bean Scope and lifecycle of
*
SpringMVC Detailed explanation of working principle
*
Spring Which design patterns are used in ?
( three ). Authentication authorization (JWT,SSO)
*
JWT Analysis of advantages and disadvantages of identity authentication and solutions to common problems
*
SSO Single sign on
( four ). Distributed
*
Introduction to distributed related concepts
*
Dubbo
*
Message queuing is actually very simple
*
RabbitMQ
*
RocketMQ
*
Kafka
*
API gateway
*
Distributed ID
*
What are the current limiting algorithms ?
*
Zookeeper
( five ). Large website architecture
*
How to design a high availability system ? What should be considered ?
( six ). Microservices
*
Spring Cloud
seven , Must know tool
( one ). Git
*
version control
*
know Git
*
Git Getting started with
( two ). Docker
*
Cognitive container
*
Let's talk again Docker Some concepts of
*
container VS virtual machine
*
Docker Basic concepts
*
Common commands
*
Build Ship and Run
*
Take a brief look Docker Underlying principle
*
summary
eight , Interview guide
（ one ）. How to write a programmer's resume
*
Why is a resume important ?
*
Here are some things you must know
*
Two rules that must be understood
*
How to write the project experience ?
*
How to write professional skills ?
*
Notes for typesetting
*
Other small tips
（ two ）. How to prepare for an interview
*
How to obtain interview opportunities in large factories ?
*
Preparation before interview
*
Resume after the interview
*
How to learn ? Is it necessary to learn various frameworks ?
（ three ）. Java Learning route and method recommendation
*
Java Basics
*
Operating system and computer network
*
Data structure and algorithm
*
Front end knowledge
*
MySQL
*
Common tools
*
Common framework
*
Simple use of multithreading
*
Distributed
*
In depth learning
*
Microservices
*
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 .
Acquisition method ： Need this 《Java Comprehensive analysis of intermediate and advanced core knowledge 》 The notes have been packed . Interested partners can help forward this article directly. Click the plug-in below to scan the QR code for free
Technology