Learning multi-thread basis, this one enough friends! (A): https://blog.csdn.net/weixin_43827227/article/details/96606212
Learning multi-thread basis, this one enough friends! (B): https://blog.csdn.net/weixin_43827227/article/details/96982701
Multithreading Summary:
1, the concept of processes and threads.
| - Process:
| - Thread:
2, multithreading jvm is reflected.
| - the main thread, the thread garbage collection, custom threads. And the position of the code they run.
3, when using multi-threaded, multi-threaded What good is that? Created to thread?
| - When the need for multi-part code is executed at the same time, it can be used.
4, two ways to create threads. ★★★★★
| - inherited Thread
| - Step
| - implement Runnable
| - Step
| - the difference between the two approaches?
5, 5 state of the thread.
For the execution and implementation of the right qualifications specific features in the state.
| - were created:
| - run:
| - Freeze:
| - temporarily blocked:
| - demise:
6, security threads. ★★★★★
| - safety reasons:
| - solving ideas:
| - resolved reflect: synchronized
| - synchronized premise: but with synchronization also security problems, we need to think in the premise.
| - synchronization methods and the difference between two forms:
| - Synchronization of the benefits and drawbacks:
| - lazy single example.
| - deadlock.
7, communication between threads. Wait / wakeup mechanism.
| - concept: multiple threads of different tasks, deal with the same resources.
| - wait wake-up mechanism. Use a locked wait notify notifyAll. ★★★★★
| - questions producer / consumers. And more than production and consumption issues and more. while determination flag. Wake-up each other with notifyAll. ★★★★★
| After --JDK1.5 appeared better solution, ★★★
Lock the interface replaces the synchronized
Condition Object Interface alternative method of monitoring, the monitor and packaged in a method of Condition
And the difference is previously set a lock can have a monitor method. Now, a Lock can lock multiple sets of monitor method of the object.
You can implement a responsible producer, a group of responsible consumers.
The difference --wait and sleep |. ★★★★★
8, stop the thread way.
| - Principle:
| - Performance: - interrupt.
9, the common thread of some methods.
| --setDaemon () daemon threads
|--join();
| - priority
|--yield();
| - in the development, you can use anonymous inner classes to complete the partial path open.
