Java Learning Notes-multithreading (java.util.concurrent and contract, reproduced)

The class that describes the thread: runable and thread belong to the Java.lang package

Second, built-in lock synchronized belongs to the JVM keyword, built-in conditional queue operation Interface Object.wait ()/notify ()/notifyall () belongs to Java.lang package

Second, the volatile that provides memory visibility and prevents command rearrangement belongs to the JVM keyword

Four, while the Java.util.concurrent package (J.U.C) contains some of the tools that are useful in Java concurrency programming, including several parts:

1, locks part: Included in the Java.util.concurrent.locks package, provide explicit lock (mutual exclusion and sketch lock) related functions;

2, Atomic part: Included in the Java.util.concurrent.atomic package, provides the atomic variable class related function, is constructs the non-blocking algorithm the foundation;

3, Executor part: Scattered in the Java.util.concurrent package, to provide thread pool related functions;

4, Collections part: Scattered in the java.util.concurrent package, providing concurrent container related functions;

5, tools part: Scattered in the Java.util.concurrent package, provide synchronization tools, such as signal volume, blocking, fence and other functions;

Reprinted from:

Java Concurrency: Multithreading and java.util.concurrent and contract summary

Java Learning Notes-multithreading (java.util.concurrent and contract, reproduced)