Preface
"JVM", a fictitious computer, is realized by simulating various computer functions on an actual computer. With the JVM, the Java language does not need to be recompiled when running on different platforms, which provides us with great convenience. Now in the interview, "JVM" related knowledge is necessary. It can be seen that Internet companies are now on JVM. Value sex.
Just last night, Tencent broke the internally forged "JVM study notes". Once it was released, it was praised and praised by various great gods on GitHub. After staying up late to eat, I immediately entered the list of my annual favorite notes. One!
I am also the first time to share with you, friends who need the full version, click here to download
Overview of JVM study notes
The first part, take you into Java
1. Walk into Java ( overview + Java technology system + Java development history + Java disk simulation machine family + prospects for the future of Java technology + actual combat: compile JDK yourself )
The second part, automatic memory management
2. Java memory area and memory overflow exception ( overview + runtime data area + HotSpot virtual machine object exploration + actual combat: OutOfMemoryError exception )
3. Garbage collector and memory allocation strategy ( overview + dead object + garbage collection algorithm + HotSpot algorithm details implementation + classic garbage collector + low latency garbage collector + selection of appropriate garbage collector + actual combat: memory allocation and recovery Strategy )
4. Virtual machine performance monitoring and fault handling tools ( overview + basic fault handling tools + visual fault handling tools + HotSpot virtual machine plug-ins and tools )
5. Tuning case analysis and actual combat ( overview + case analysis + actual combat: Eclipse operating speed tuning )
For those who need the full version, click here to download
The third part, virtual machine execution subsystem
6. Class article structure ( overview + irrelevant cornerstone + C lass class file structure + bytecode instruction introduction + public design, private implementation + class file structure development )
7. Virtual machine class loading mechanism ( overview + timing of class loading + process of class loading + class loader + Java modular system )
8. Virtual machine bytecode execution engine ( overview + runtime stack frame structure + method call + dynamic type language support + stack-based bytecode interpretation execution engine )
9. The case and actual combat of class loading and execution subsystem ( overview + case analysis + actual combat: realize remote execution function by yourself )
The fourth part, program compilation and code optimization
10. Front-end compilation and optimization ( overview + Javac compiler + taste of Java syntactic sugar + actual combat: plug-in annotation processor )
11. Back-end compilation and optimization ( overview + just-in-time compiler + ahead-of-time compiler + compiler technology optimization + actual combat: deep understanding of Graal compiler )
The fifth part, efficient development
12. Java memory model and thread ( overview + hardware efficiency and consistency + Java memory model + Java and thread + Java and coroutine )
13. Thread safety and lock optimization ( overview + thread safety + lock optimization )
to sum up
An Internet company of Tencent's level covers almost all the current mainstream Internet industries. A company of this size must be technically tempered to achieve this top level of technology. The "JVM study notes" produced must also stand scrutiny.
If you want to improve your JVM technology, I think this note can definitely help everyone. If you need it, I am willing to share it with you for free, click here to download ! Or scan to add assistant VX:
