java--Multithreading Management (concurrent package)

First on the two picture, the left one is the concurrent under the package of all the interface, the right is all the classes under the package, in fact, we often use the interface and classes are a few, the next will be described in detail.

1. Common interfaces

Callable: A thread interface with a return value

Future: A generic interface used to receive the return value, providing an operation that cancle the terminating thread

Executor: Performer of specific runnable tasks

Executorservice: A thread pool manager that can dispatch runnable and callable tasks

Blockingqueue: Blocking queues

2. Common Classes

(1) Executors: The operation used to create the thread pool

Executors.newfixedthreadpool (n): Create a fixed-size thread pool

Executors.newcachedthreadpool (): Create a thread-free pool that automatically recycles and exploits idle (over 60s unused) threads

Executors.newsinglethreadexecutor (): a single background thread that ensures that individual tasks are executed in order, and that no multiple threads are active at the same time.

(2) Semaphore: A statistical semaphore used to limit the number of threads that can access certain resources.

Use the Acquire () function to consume a resource

Use the release () function to release a resource

Not to be continued ....

java--Multithreading Management (concurrent package)