Duke University
Skills you'll gain: File I/O, UI Components, Object Oriented Design, Java Programming, Software Design, User Interface (UI) Design, Debugging, Web Design and Development, Software Engineering, Code Reusability, Hypertext Markup Language (HTML), Computer Programming, Program Development, Event-Driven Programming, Bioinformatics, Encryption, Javascript, Algorithms, Data Analysis, Cascading Style Sheets (CSS)
Beginner · Specialization · 3 - 6 Months

EDUCBA
Skills you'll gain: Hypertext Markup Language (HTML)
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Microservices, Google Cloud Platform, Cloud Applications, Spring Framework, Cloud Development, Spring Boot, Database Management, Cloud Deployment, Cloud-Native Computing, Databases, Database Development, Database Systems, Software Architecture, Application Frameworks, Application Performance Management, Service Oriented Architecture, Application Deployment, Configuration Management
Intermediate · Course · 1 - 4 Weeks
Codio
Skills you'll gain: Apache Maven, Build Tools, JSON, JUnit, Java Programming, Java, Web Services, Programming Principles, Package and Software Management, Data Structures, Object Oriented Programming (OOP), Network Protocols, Unit Testing, Style Guides
Intermediate · Course · 1 - 4 Weeks

Codio
Skills you'll gain: Algorithms, Data Structures, Java, Java Programming, Other Programming Languages
Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: JUnit, Test Driven Development (TDD), Unit Testing, Software Testing, Test Case, Eclipse (Software), Test Script Development, Test Data, Development Testing, Test Automation, Test Execution Engine, Integrated Development Environments, Testability, Java, Test Tools, Program Development, Maintainability, Software Design
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Object Oriented Programming (OOP), Java, Java Programming, Software Development Tools, Software Development Life Cycle, Program Development, Computer Programming Tools, Computer Programming, Development Environment, Software Development, Programming Principles, Integrated Development Environments, Software Installation, Command-Line Interface, Linux Commands
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Java Programming, Java, Integrated Development Environments, Mobile Development, Computer Programming, Programming Principles, Data Structures
Beginner · Guided Project · Less Than 2 Hours

Packt
Skills you'll gain: Secure Coding, Java Programming, Maintainability, Hardening, Java, Software Design Patterns, Application Security, Software Design, Data Structures, Object Oriented Design, Software Architecture, Performance Tuning, Memory Management, API Design, Code Reusability, Object Oriented Programming (OOP), Web Servers, Application Programming Interface (API), Software Development, Virtualization
Intermediate · Specialization · 3 - 6 Months

Vanderbilt University
Skills you'll gain: Android Studio, Java, Java Programming, Android Development, Object Oriented Design, Object Oriented Programming (OOP), Mobile Development, Android (Operating System), Data Access, Data Structures, Programming Principles, Mobile Development Tools, Development Environment, Code Reusability, Integrated Development Environments, Computational Logic
Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Java Platform Enterprise Edition (J2EE), Application Deployment, Web Applications, Application Servers, Java, Web Servers, Java Programming, Object-Relational Mapping, Web Development, Context Management, Scripting Languages, Scripting, Middleware, Server Side, Data Storage, Data Sharing, Data Persistence, Event-Driven Programming, Enterprise Application Management, Web Components
Intermediate · Specialization · 1 - 3 Months

LearnQuest
Skills you'll gain: Spring Framework, Java Programming, Java, File I/O, Java Platform Enterprise Edition (J2EE), Object Oriented Programming (OOP), Application Frameworks, Code Reusability, Object Oriented Design, Data Structures, File Management
Intermediate · Course · 1 - 3 Months