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.

LearnKartS
Skills you'll gain: Git (Version Control System), GitHub, Bitbucket, Version Control, Software Versioning, GitLab, Software Configuration Management, Collaborative Software, Integrated Development Environments, Software Development, Code Review, IntelliJ IDEA, Eclipse (Software), Application Lifecycle Management, Linux, Release Management, Command-Line Interface
Beginner · Specialization · 1 - 3 Months

Board Infinity
Skills you'll gain: jQuery, Javascript, Web Applications
Intermediate · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: Open Web Application Security Project (OWASP), Secure Coding, Application Security, Web Applications, Javascript, Web Development, Node.JS, Security Controls, Web Servers, Hypertext Markup Language (HTML), Java Programming
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Spring Boot, Database Design, Object-Relational Mapping, Database Application, Data Modeling, Java Platform Enterprise Edition (J2EE), Embedded Software, Database Architecture and Administration, Technical Documentation, Requirements Analysis
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Blockchain, Frontend Integration, Transaction Processing, Event-Driven Programming, Front-End Web Development, JavaScript Frameworks, Event Monitoring, Full-Stack Web Development, Development Environment, Web Development, Web Applications, Program Development, React.js, Emerging Technologies, Application Development, Javascript, FinTech
Intermediate · Course · 1 - 4 Weeks

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

Skills you'll gain: Cloud-Native Computing, Cloud Applications, Data Store, Cloud Development, Serverless Computing, Application Deployment, Google Cloud Platform, Cloud Deployment, Application Development, Application Performance Management, Application Design, Infrastructure as Code (IaC), Cloud API, API Gateway, Authentications, Application Programming Interface (API), Microservices, Cloud Storage, Cloud Computing, Debugging
Intermediate · Specialization · 3 - 6 Months
Skills you'll gain: Jest (JavaScript Testing Framework), User Acceptance Testing (UAT), Cucumber (Software), Postman API Platform, Software Testing, Behavior-Driven Development, Test Tools, Selenium (Software), Test Driven Development (TDD), API Testing, Unit Testing, Performance Testing, Functional Testing, Test Automation, Web Development Tools, Usability Testing, User Interface (UI), Test Case, Javascript
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Blockchain, Development Environment, Software Development Tools, Application Deployment, Transaction Processing, Application Design, Front-End Web Development, Cloud Development, Event-Driven Programming, Development Testing, Javascript
Beginner · Course · 1 - 4 Weeks
Skills you'll gain: Web Content Accessibility Guidelines, User Interface (UI), Usability, Web Design, Hypertext Markup Language (HTML), Front-End Web Development, UI Components, Semantic Web, Cascading Style Sheets (CSS), Javascript
Intermediate · Guided Project · Less Than 2 Hours

Scrimba
Skills you'll gain: React Redux, React.js, Cascading Style Sheets (CSS), Web Components, JavaScript Frameworks, UI Components, HTML and CSS, Routing Protocols, Front-End Web Development, User Interface (UI), Web Frameworks, Maintainability, Authentications, Web Development Tools, Application Frameworks, Application Programming Interface (API), Web Design, Restful API, Javascript, Web Development
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Spring Boot, Configuration Management, API Gateway, JUnit, Java Programming, Java, Application Design, Unit Testing, Middleware, Service Oriented Architecture, Software Design Patterns, Authentications
Advanced · Course · 1 - 4 Weeks