HTML CSS JavaScript DHTML Java Spring Boot Android Docker

Web frontend

HTML CSS Bootstrap JavaScript Dynamic HTML jQuery

Web backend

Spring Boot Thymeleaf templator Docker

JVM

Java Kotlin Java/Kotlin libraries

JS

JavaScript jQuery

Programming

General Design patterns Architectural patterns Algorithms

Mobiles

Android

Graphics

OpenGL

Others

Math Gradle

Java tutorial

installation versions comments statements naming scope literals types variables operators workflow functions lambdas exceptions generics OOP classes constructors static members inheritance encapsulation getters/setters nested classes abstract classes interface enums Reference strings arrays collections maps regexp functional api stream byte I/O streams char I/O streams files threads synchronized collections blocking collections concurrent collections atomic vars url/uri http Examples creational patterns lru cache file operations

Reference

There are official documentation from Oracle

java 8 doc
java 11 doc

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