Java courses can help you learn object-oriented programming, data structures, exception handling, and multithreading concepts. You can build skills in writing efficient algorithms, debugging code, and developing user interfaces. Many courses introduce tools like Eclipse and IntelliJ IDEA, which are commonly used for coding and testing Java applications, along with frameworks such as Spring and Hibernate that facilitate web development and database management.

Scrimba
Skills you'll gain: Cascading Style Sheets (CSS), HTML and CSS, Front-End Web Development, Javascript, Responsive Web Design, Web Design and Development, Maintainability
Intermediate · Course · 1 - 4 Weeks
University of Glasgow
Skills you'll gain: Computational Thinking, JSON, Application Deployment, Data Structures, Javascript, Application Development, HTML and CSS, Data Analysis, Code Review, Software Development, Data Visualization Software, Web Development, Scripting, Prototyping, Data Processing, Programming Principles, Unsupervised Learning, Front-End Web Development, Data Science, Computer Programming
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Version Control, Unity Engine, GitHub, Bitbucket, Git (Version Control System), Android Development, C# (Programming Language), Android (Operating System), Game Design, Mobile Development, Scripting, Scripting Languages, 3D Assets, Video Game Development, Animation and Game Design, User Interface (UI) Design, Computer Graphics, Application Development, Cross Platform Development, User Interface (UI)
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Javascript, Object Oriented Design, JSON, Web Applications, Computer Programming, Scripting Languages, Hypertext Markup Language (HTML), Cascading Style Sheets (CSS), Prototyping
Beginner · Specialization · 3 - 6 Months

Board Infinity
Skills you'll gain: Responsive Web Design, Restful API, User Interface (UI) Design, Application Programming Interface (API), Web Development Tools, Database Design, HTML and CSS, User Interface and User Experience (UI/UX) Design, API Design, Front-End Web Development, MongoDB, Javascript, Postman API Platform, Bootstrap (Front-End Framework), React.js, Database Management, OAuth, Authentications, Relational Databases, Software Documentation
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Test Automation, Selenium (Software), Test Tools, Test Case, Software Testing, Test Execution Engine, Test Data, Apache Maven, Automation, Application Frameworks, Java, Extensible Markup Language (XML), Data Import/Export
Beginner · Course · 1 - 3 Months

Whizlabs
Skills you'll gain: Amazon Web Services, Containerization, Docker (Software), Kubernetes, Application Deployment, Cloud-Native Computing, CI/CD, Devops Tools, Application Servers, Scalability
Intermediate · Course · 1 - 4 Weeks

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

Skills you'll gain: Jenkins, CI/CD, Continuous Integration, DevOps, Application Deployment, Devops Tools, Continuous Delivery, Spring Framework, Software Configuration Management, Build Tools, Version Control
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Spring Framework, Hibernate (Java), Spring Boot, Java, Object-Relational Mapping, Database Management, Application Frameworks, Data Access, Apache Maven, SQL, Object Oriented Programming (OOP), Model View Controller, Functional Design
Intermediate · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Apache Hadoop, Big Data, Apache Hive, Apache Spark, NoSQL, Data Infrastructure, File Systems, Data Processing, Data Management, Analytics, Data Science, SQL, Query Languages, Data Manipulation, Java, Data Structures, Distributed Computing, Scripting Languages, Data Transformation, Performance Tuning
Intermediate · Specialization · 3 - 6 Months
University of Glasgow
Skills you'll gain: Computational Thinking, Javascript, Programming Principles, Computer Programming, Computer Graphics, Animations, Debugging, Scripting Languages
Beginner · Course · 1 - 4 Weeks