They all say that the end of the year is sad, but now I really feel it!
It was almost time to go home happily with the year-end bonus to celebrate the New Year, but I still couldn't resist it. I got a sunburn . What was even worse was that the worker had a fever and was lying in bed, and he had to wait for the layoff notice from HR. ... A double blow to the body and soul, waiting for recovery and compensation, this process was too painful.
I am unemployed at the end of the year and there are not many opportunities. It is almost impossible to find a suitable job in a short time. When you feel well and stay at home, I mainly recommend that you do two things:
First: Organize your work experience and make a job search plan for the new year. Some good companies such as have released new hc. As soon as the market situation picks up, interviews will begin immediately.
Second: review interview eight-part essay and technical information. The purpose of is mainly to increase the probability of success in interviews, to prepare for getting a few more favorite offers, and to take advantage of this free time to make up for technical shortcomings.
I have just recently completed the technical aspect of Dachang must ask 's concurrent programming. I have gone through the knowledge of concurrent programming twice. I have also reviewed the real interview questions and coping skills. I have a comprehensive and systematic understanding of it.
today I will release my learning methods and materials, so that everyone can improve together and overcome difficulties together!
First of all, it is a super hard-core learning artifact - a copy of "Java Concurrency Implementation Principles Study Notes.pdf" shared by the boss to me
directly displays the directory
. The following will directly show you screenshots of part of the content. If you need to obtain this manual, you can directly forward it + follow it and send a private message (study) to get it for free!
multi-threaded basic
- thread graceful shutdown
- stop () and destroy () function
- daemon thread
- sets the closed flag
- synchronized keyword
- What is the object of the lock? What is the essence of the
- lock?
- synchronized implementation principle
- wait() and notify()
- producer-consumer model
- why must be used with synchronized
- why wait () The lock must be released when
- wait () Problems with notify ()
- volatile keyword
- 64-bit write atomicity (Half Write)
- memory visibility
- reordering: DCL problem
- comprehensive application: lock-free programming
- one-write-one-read lock-free queue: memory barrier
- one-write-multiple-read lock-free queue: volatile keyword
- multiple-write-multiple-read lock-free queue :CAS
- no lock stack
- no lock linked list
Atomic class
Lock and Condition
- mutex
- read-write lock
- Condition
- StampedLock
synchronization tool class
concurrent container
- BlockingQueue
The implementation principle of thread pool and Future
- thread pool
- class inheritance system of thread pool
- ThreadPoolExector
- Callable and Future
- ScheduledThreadPoolExecutor
- Executors tool class
ForkJoinPool
- ForkJoinPool usage
- work stealing queue
- work stealing algorithm: task execution process analysis
- sequence Lock eqLock
- scanGuard parsing
CompletableFuture
- CompletableFuture internal principle
- Mesh execution of tasks: directed Acyclic graph
Due to space limitations, this document has a total of 384 pages. I cannot show them all for you. I hope you will forgive me
is written at the end.
concurrency not only needs to consider issues such as static resources, deadlock , resource fairness, etc., but also often needs to consider performance issues . In some business scenarios, it is often more complicated. These are all important to Java. The coders caused quite a problem. If you have a certain understanding of the concurrent package, you can solve many problems. If you need a friend who needs Java concurrent JDK source code analysis, you only need to forward + comment. Follow and I will directly send a private message [ learn ] to get the high-definition version of the document 100% free!
