What is a Java class library?

Java is not dependent on any specific operating system so Java applications cannot depend on the platform dependent native libraries, therefore, instead of those Java provides a set of dynamically loaded libraries that are common to modern operating systems.

These libraries provide –

• Container classes and Regular Expressions.
• Interfaces for tasks that depend on the hardware of the OS such as network and file access.
• In case, the underlying platform does not support certain feature of Java then, these libraries surpass that specific feature if needed.