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

LearnQuest
Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Object Oriented Design, Software Design
Intermediate · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Decision Tree Learning, Fraud detection, Regression Analysis, Debugging
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Integration Testing, Command-Line Interface, Application Deployment
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Java, Data Structures, Java Programming, Data Access, Data Cleansing
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Data Structures, Java, Theoretical Computer Science, Programming Principles, Algorithms, Object-Relational Mapping
Intermediate · Course · 1 - 4 Weeks

Codio
Skills you'll gain: Algorithms, Data Structures, Java, Theoretical Computer Science, Computer Programming, Computational Thinking
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Object Oriented Programming (OOP), Java, Algorithms, Application Programming Interface (API), Data Structures, Debugging
Intermediate · Guided Project · Less Than 2 Hours

Vanderbilt University
Skills you'll gain: Spring Framework, Object-Relational Mapping, Cloud Security, Java, Scalability, Cloud Services, Web Services, Cloud Computing, JSON, Security Controls, Restful API, Web Applications, Object Oriented Design, Database Design, Software Design, Dependency Analysis
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Java, Java Programming, Apache Spark, Applied Machine Learning, Deep Learning, Data Processing, Application Deployment, Natural Language Processing, Data Cleansing, Machine Learning Algorithms, Machine Learning, Feature Engineering, Data Transformation, Scalability, Artificial Neural Networks, Regression Analysis, Interoperability
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Information Management, Application Programming Interface (API)
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Cucumber (Software), Selenium (Software), Apache Maven, Java, Object Oriented Programming (OOP), Issue Tracking, Gherkin (Scripting Language), Test Automation, Behavior-Driven Development, Test Execution Engine, Test Case, Debugging, Integration Testing, Data Structures
Intermediate · Course · 1 - 3 Months