Why do we need to learn JDK source code?

Of course not to pretend, after all, who is looking for things to abuse themselves…

1. You can’t run away from an interview. Now, if you are interviewing for a Java-related position, you will definitely be involved in JDK source code.

Understand the principle is not panic. We as JDK users, although said every day use very happy, but sometimes encountered problems or have to follow the underlying source code to see, to help us better understand the principle,

3. Learn great code, ideas, and patterns. After all, the JDK is an excellent code library that we use every day, and the source code is in it. As an aspiring programmer, reading the source code also allows us to absorb more excellent ideas and patterns.

So is the source code difficult?

Nonsense, of course it is difficult, otherwise I would not have not read it, and often forget, cry…

, after all, such as the JDK source code, and we usually try to write small example, write business code is different, the somebody else, after all, is a class library for performance, stability, generality, extensibility into account, add a lot of code, generic, and some considerations on the design pattern, so it seems there is so easy, can’t see through it.

So this thing is certainly a long process, but we must have enough confidence, I firmly believe that “JDK source notes” somebody else wrote out, I do not believe I do not understand! Let’s find out!

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The main content

Chapter 1 The basics of multithreading

  • What is the nature of locks

Chapter 2: Atomic classes

  • AtomicBoolean and AtomicReference

  • Striped64 and LongAdder

Chapter 3 Lock and Condition

  • The mutex

  • Read-write lock

Chapter 4 Synchronization utility classes

  • CountDownLatch

  • Exchanger

  • Phaser

Chapter 5 concurrent Containers

Lock-free queues and lock-free stacks based on CAS have been introduced in Lock and Phaser implementations. This chapter provides a comprehensive overview of the various Concurrent containers provided by the Concurrent package.

  • BlockingQueue

  • ConcurrentHashMap

  • ConcurrentSkipListMap/Set

Chapter 6 thread pools and Futures

  • Thread pools and futures

  • Class inheritance architecture for thread pools

  • ScheduledThreadPoolExecutor

Chapter 7 ForkJoinPool

  • Work steal queue

  • ForkJoinTask的fork/join

  • ForkJoinPool graciously closed

CompletableFuture

  • CompletableFuture usage

  • Mesh execution of tasks: directed acyclic graphs

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Look at the source code this thing can not be urgent, slow to faster! Also hope that this “JDK source code analysis” to you big brothers are also helpful! ‘.