In the previous section, we focused on Java's low-level support for threads. In this section, we will move on to look at Java's high-level thread support provided by the java.util.concurrent package. This package has various classes and interfaces that provide very useful functionalities to help us implement multithreaded and concurrent programming. In this section, we will mainly focus on some of the most useful utilities of this package.

The following diagram shows the high-level overview of the java.util.concurrent API:

Let's discuss the interfaces in detail.