In the process of looking for a job, we often see words like " the level of annual salary that matches the number of years of work ", so what exactly is a match ?
Of course, this topic can be said that the benevolent see benevolence, and the wise see wisdom.
In fact, the Internet career can be roughly divided into two stages. In the three to five years after graduation, it is mainly based on learning and accumulation . From the beginning of the campus " fresh guys " who don't understand anything, they change to " professionals. " If you are a Java developer , at this stage you will learn:
1. Basic Java knowledge, multithreading, collection classes, JVM
2. Advanced knowledge, design patterns, system design and methodology
3. Mainstream frameworks, Spring, Spring Boot, MyBatis...
4. Microservices, Dubbo, ETCD, Spring Cloud...
5. Database, Redis, ES, MySQL, sub-database and sub-table
So if you have been in Curd a few years ago and have not studied systematically , what should you do to make up for the technological growth of the first 5 years ?
Here is a compilation of a systematic Java learning manual for benchmarking Ali P8 . Everyone wants to check and fill vacancies, learn systematically , and quickly learn and advance. This manual is applicable!
The manual includes Java, collections, multithreaded concurrency, reflection, locking, Spring, SpringMVC, SpringBoot, JPA, Mybaits, microservices, Netty, RPC, network, log, message queue, MySQL, Redis, design patterns, load balancing, one-time Algorithms, data structures, Docker
1. Java collection (partial content)
Interface inheritance and implementation
List
- ArrayList: array
- Vector: array implementation, thread synchronization
- LinkList: linked list
Set
- HashSet：hash表
- TreeSet: Binary Tree
- Linkhashset
Map
- Java implementation
Thread safe
Sortable
Record insertion sort
2. Java multi-threaded concurrency (partial content)
Thread realization/creation method
4 types of linear pools
- newCachedThreadPool
- newFixedThreadPool
- newScheduledThreadPool
- newSingleThreadExecutor
Thread life cycle (state)
- New status
- Ready state
- Operating status
- Blocking state
- Thread death
4 ways to terminate threads
- End of normal operation
- Exit the thread with an exit flag
- The Interrupt method ends the thread
- The stop method terminates the thread (thread is not safe)
3. Java lock (partial content)
- Optimism
- Pessimistic lock
- Spin lock
- Synchronized synchronization lock
- ReentrantLock
- Reentrant lock (recursive lock)
- Fair lock and unfair lock
- ReadWriteLock
- Shared lock and exclusive lock
- Heavyweight lock/lightweight lock
- Lock optimization
4. Spring (partial content)
Spring features
- Lightweight
- Inversion of Control
- Face-to-face
- container
Spring common modules
Spring main package
Spring common annotations
Spring third-party integration
SpringIOC
- High-level view of Spring container
- IOC container implementation
- SpringBean scope
- SpringBean life cycle
Spring dependency injection four ways
AOP two proxy methods
Microservices (partial content)
Netty/RPC (partial content)
Network (partial content)
Log (partial content)
Indirect in the message (part of the content)
Due to space reasons, this purely handwritten note has been sorted into a PDF document. Friends who need to refer to the complete documentation of the Ali P8 Systematic Java Learning Manual can click on the portal ! !