
EDUCBA
Skills you'll gain: Model View Controller, Java Platform Enterprise Edition (J2EE), Back-End Web Development, Server Side, Data Access, Apache Tomcat, Application Servers, Relational Databases, Databases, Java, Web Servers, SQL, Stored Procedure, Authentications, Web Applications, Secure Coding, Middleware, Software Design Patterns, Data Validation
Intermediate · Course · 1 - 3 Months

JetBrains
Skills you'll gain: Kotlin, Object Oriented Programming (OOP), Java, Java Programming, Spring Framework, Android Development, IntelliJ IDEA, Functional Design, Interoperability, Unit Testing
Intermediate · Course · 1 - 3 Months

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

LearnKartS
Skills you'll gain: Java Programming
Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Apache Maven, Spring Framework, Microservices, Spring Boot, Java, Java Programming, Back-End Web Development, Software Architecture, Server Side, Load Balancing, Cloud Development, Restful API, Systems Architecture, Web Applications, Scalability
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Apache Maven, Eclipse (Software), Data Import/Export, Kotlin, Software Installation, Unit Testing, Database Management, File Management
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Restful API, Application Security, Java, Application Frameworks, Model View Controller, Development Environment, Web Applications, Application Programming Interface (API), Apache Maven, Authorization (Computing), Authentications
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Full-Stack Web Development, Email Automation, Front-End Web Development, User Interface (UI), Java, Server Side, Java Programming, MySQL, Hypertext Markup Language (HTML), Web Development, Web Applications, Data Access, Back-End Web Development, Development Testing, Cascading Style Sheets (CSS), Databases
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Kotlin, Cross Platform Development, Android Jetpack, Mobile Development, Android Development, Back-End Web Development, UI Components, User Interface (UI), Business Logic, Server Side, Middleware
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Java Programming, Data Access, Programming Principles, Computational Logic
Intermediate · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: IntelliJ IDEA, Apache Maven, Build Tools, Integrated Development Environments, Software Development Tools, Version Control, Software Engineering Tools, Git (Version Control System), Development Environment, Debugging, Scripting Languages, Visualization (Computer Graphics), Databases, Relational Databases
Intermediate · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: JUnit, Unit Testing, Debugging, Java, Maintainability, Software Development, Secure Coding, Software Testing, Test Case, Authentications, Application Security, Cryptography, Object Oriented Programming (OOP), Eclipse (Software), Integrated Development Environments, Encryption, Data Structures, File Management
Beginner · Course · 1 - 4 Weeks