Class Libraries

Java Class Libraries (JCL)

Java Class Libraries refers to the set of loadable Java classes that Java applications can call during runtime. These Java Class Libraries consist of a standardized reusable code with which programmers become familiar and are free to implement within their own programs.

Some examples of Java Class Libraries are:

(1) java.lang

(2) java.Math

(3) java.awt

(4) java.swing

(5) java.util

(6) java.ArrayList

These are the most common class libraries with which a beginning Java programmer must become familiar. There are many more classes that can be invoked, to get a full list visit Oracle's site:

https://docs.oracle.com/javase/8/docs/api/allclasses-frame.html