The Java Wikibook, officially titled "Java Programming" , is a free, open-content textbook that is part of the Wikibooks project, a sister project to Wikipedia. Like Wikipedia, it is written and maintained by volunteers—ranging from professional software engineers and university professors to advanced hobbyists and students. The book is constantly updated, corrected, and expanded, reflecting the evolving nature of the Java language itself (from Java 1.0 to the latest LTS versions like Java 17 and beyond).
: Covers the core pillars of Java, including classes, inheritance, polymorphism, and encapsulation. java wikibooks