https://bcs.wiley.com/he-bcs/Books?action=index&itemId=0470105550&bcsId=3663
Horstmann: Java Concepts for Java 5 and 6, 5th Edition - Student Companion Site
java concepts
https://bcs.wiley.com/he-bcs/Books?action=chapter&bcsId=1789&itemId=0471489050&chapterId=8670
Silberschatz, Galvin, Gagne: Operating Systems Concepts with Java, 6th Edition - Student Companion...
operating systems
https://www.digitalocean.com/community/tutorials/oops-concepts-java-example?comment=182172
OOP Concepts in Java: Examples and Tutorial | DigitalOcean
Learn object-oriented programming concepts in Java. Complete guide covering encapsulation, inheritance, polymorphism, abstraction with real-world examples.
java examplesoopconceptstutorialdigitalocean
https://www.digitalocean.com/community/tutorials/oops-concepts-java-example?comment=182177
OOP Concepts in Java: Examples and Tutorial | DigitalOcean
Learn object-oriented programming concepts in Java. Complete guide covering encapsulation, inheritance, polymorphism, abstraction with real-world examples.
java examplesoopconceptstutorialdigitalocean