JAXP: It stands for Java API for XML Processing. This provides a common interface for creating and using DOM, SAX, and XSLT APIs in Java regardless of which vendor’s implementation is actually being used.
JAXB: It stands for Java API for XML Binding. This standard defines a system for a script out of Java objects as XML and for creating Java objects from XML structures.
Learn more about Java Multithreading from this tutorial!