Codio
Skills you'll gain: Apache Maven, JSON, JUnit, Java Programming, Java, Restful API, Integrated Development Environments, Programming Principles, Package and Software Management, Data Structures, Object Oriented Programming (OOP), Network Protocols, Unit Testing, Style Guides
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Object Oriented Programming (OOP), Java, Java Programming, Object Oriented Design, Computer Programming, Programming Principles, Data Structures, Debugging
Beginner · Course · 1 - 3 Months

Coursera
Skills you'll gain: Javascript, User Interface (UI), Web Development, Web Development Tools, Scripting, Hypertext Markup Language (HTML)
Beginner · Guided Project · Less Than 2 Hours

Universidad de Palermo
Skills you'll gain: Object Oriented Design, Object Oriented Programming (OOP), Java, Software Design, Software Design Patterns, Programming Principles, Software Development
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Object Oriented Programming (OOP), Java, Object Oriented Design, Data Structures, Computer Programming, Debugging
Intermediate · Course · 1 - 4 Weeks

Peking University
Skills you'll gain: Java Programming, Java, Maintainability, Software Design Patterns, Computer Programming, Object Oriented Programming (OOP), JUnit, C and C++, C++ (Programming Language), Application Programming Interface (API), UI Components, Algorithms, Application Development, Network Model, Software Development Tools, Data Structures, File Management
Intermediate · Course · 1 - 3 Months

Northeastern University
Skills you'll gain: Object Oriented Design, Java, Software Architecture, Object Oriented Programming (OOP), Data Structures, Software Design, Computer Programming, Programming Principles, Application Development, Unified Modeling Language, UI Components
Mixed · Course · 1 - 3 Months

Skills you'll gain: Java Platform Enterprise Edition (J2EE), Object-Relational Mapping, Java, Application Servers, Middleware, Application Deployment, Enterprise Architecture, Server Side, Transaction Processing, Business Logic
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Java, Java Programming, Object Oriented Programming (OOP), Object Oriented Design, Data Structures, Computer Programming, Program Development, File Management, Algorithms, Debugging, Problem Solving
Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Test Driven Development (TDD), Unit Testing, Development Testing, Software Testing, Testability, Java, Test Case
Intermediate · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: Object Oriented Programming (OOP), Java Programming, Data Structures, Programming Principles, File Management, Data Storage
Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Java Platform Enterprise Edition (J2EE), Scripting, Application Servers, Javascript and jQuery, Java, Apache Tomcat, Server Side, Hypertext Markup Language (HTML), Web Applications, Model View Controller
Intermediate · Course · 1 - 4 Weeks