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.

Johns Hopkins University
Skills you'll gain: Apache Hadoop, File Systems, Big Data, Data Infrastructure, Java, Data Structures, File Management, Systems Architecture, Data Processing, Distributed Computing, Data Storage, Development Environment, Scalability
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Server Side, Restful API, API Design, Database Management, Back-End Web Development, Databases, Database Systems, Node.JS, Application Programming Interface (API), Full-Stack Web Development, Authentications, Web Applications, JavaScript Frameworks, Web Development, Web Servers, Authorization (Computing), NoSQL, MongoDB, Servers, Javascript
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: JUnit, Unit Testing, Software Quality Assurance, Integrated Development Environments, Software Testing, Quality Assurance, Java, Software Development Tools, Debugging, Performance Testing
Intermediate · Guided Project · Less Than 2 Hours

Logical Operations
Skills you'll gain: Responsive Web Design, HTML and CSS, Web Development, Javascript, Web Design, JavaScript Frameworks, Web Development Tools, Web Servers, Web Design and Development, Browser Compatibility, Web Content, Web Analytics and SEO, Server Side, Hypertext Markup Language (HTML), Web Applications, Web Frameworks, Front-End Web Development, Event-Driven Programming, Web Content Accessibility Guidelines, Software Development
Mixed · Course · 1 - 3 Months

Skills you'll gain: Bootstrap (Front-End Framework), Responsive Web Design, UI Components, HTML and CSS, Application Deployment, Cloud Deployment, Web Design, Web Design and Development, Web Development, Front-End Web Development, Web Development Tools, Interactive Design, Javascript, Cloud Hosting, User Interface (UI), User Interface (UI) Design, Typography, Animations, Data Validation
Beginner · Course · 1 - 3 Months

Skills you'll gain: Jest (JavaScript Testing Framework), Unit Testing, TypeScript, Software Testing, Test Driven Development (TDD), Code Coverage, Test Automation, Development Testing, Testability, Test Case, Javascript, Debugging
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Apache Kafka, JUnit, Spring Boot, Unit Testing, Integration Testing, Data Pipelines, Restful API, Event-Driven Programming, Encryption, Distributed Computing
Intermediate · Course · 3 - 6 Months

Skills you'll gain: Apache Hadoop, Big Data, Cloud Management, File Systems, Data Processing, Data Storage, Java, Operating System Administration, Systems Administration, Distributed Computing, Command-Line Interface, Linux Commands
Mixed · Course · 1 - 3 Months

Skills you'll gain: Jest (JavaScript Testing Framework), Unit Testing, TypeScript, Angular, Software Testing, JavaScript Frameworks, Web Development Tools, Development Testing, Test Case, Code Coverage, Test Automation, Testability, Integration Testing, Javascript, Node.JS, UI Components, Debugging, Mockups
Intermediate · Specialization · 1 - 4 Weeks

Skills you'll gain: React.js, Bootstrap (Front-End Framework), UI Components, HTML and CSS, Cascading Style Sheets (CSS), Application Programming Interface (API), User Interface (UI), Javascript, Web Development Tools, Network Routing, Event-Driven Programming, Data Validation, Debugging
Intermediate · Course · 1 - 3 Months

Scrimba
Skills you'll gain: Javascript, Restful API, Web Development
Intermediate · Course · 1 - 4 Weeks

University of Virginia
Skills you'll gain: Model View Controller, Debugging, Software Design, User Interface and User Experience (UI/UX) Design, User Interface (UI), UI Components, Web Applications, Algorithms, JSON, Program Development, User Story, Javascript, Event-Driven Programming, Automation, Data Structures
Beginner · Course · 1 - 4 Weeks