Core java tutorial for beginners and professionals with examples on Basics, OOPs, Methods, Overloading, Overriding, Inheritance, Polymorphism, Interfaces, Packages, Abstract classes, String handling, Exception handling, IO, Collections, Multithreading, Serialization and more.

Java language project initially started in June 1991 by James Gosling, Mike Sheridan, and Patrick Naughton. An oak tree stood outside Gosling’s office at that time and java named as oak initially. It later renamed as Green and was later renamed as java from java coffee.

Working core java examples programs with output and source code.

Basic tutorial: