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: Model Context Protocol, Agentic systems, Vector Databases, Retrieval-Augmented Generation, Prompt Engineering, Tool Calling, Google Gemini, Agentic Workflows, AI Workflows, Generative AI Agents, Server Side, Node.JS, Scalability, MongoDB, Embeddings, Large Language Modeling, Natural Language Processing, Web Development, Machine Learning, Javascript
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Selenium (Software), Test Automation, Behavior-Driven Development, Gherkin (Scripting Language), Test Script Development, Unit Testing, Software Testing, Jenkins, CI/CD, Continuous Integration, Test Tools, Apache Maven, Automation, Test Case, DevOps, Java, Test Data, C# (Programming Language), Java Programming, Python Programming
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Hypertext Markup Language (HTML), HTML and CSS, Cascading Style Sheets (CSS), Web Design, Web Design and Development, UI Components, Web Language, Front-End Web Development, Mobile Development, Javascript, Animations, User Interface (UI), Web Development Tools, Web Content Accessibility Guidelines, Typography, Semantic Web, GitHub, Version Control, Application Deployment, Development Environment
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Test Script Development, Unit Testing, Test Case, Development Testing, Test Tools, React.js, API Testing, Software Testing, Web Development Tools, Javascript
Intermediate · Guided Project · Less Than 2 Hours

Coursera
Skills you'll gain: Data Visualization, Interactive Data Visualization, Visualization (Computer Graphics), JSON, Plot (Graphics), Data Mapping, Javascript
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Apache Hadoop, Real Time Data, Apache Spark, Apache Kafka, Data Integration, AWS Kinesis, Apache Hive, Data Pipelines, Big Data, Applied Machine Learning, Systems Design, System Design and Implementation, Distributed Computing, Query Languages, Data Processing, NoSQL, MongoDB, Data Import/Export, SQL, Scalability
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Object Oriented Programming (OOP), Object Oriented Design, Javascript, Software Design Patterns, Data Management, Data Structures, Web Development, Performance Tuning
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Cucumber (Software), Selenium (Software), Apache Maven, Object Oriented Programming (OOP), Behavior-Driven Development, Java, Jenkins, Test Tools, Object Oriented Design, Gherkin (Scripting Language), Continuous Integration, Test Automation, Java Programming, CI/CD, Test Execution Engine, Application Frameworks, Test Script Development, Software Testing, Software Design Patterns, Build Tools
Intermediate · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Git (Version Control System), Version Control, IntelliJ IDEA, Integrated Development Environments, Software Development Tools, Microsoft Visual Studio, Eclipse (Software), Software Versioning, Release Management, Software Development
Intermediate · Course · 1 - 4 Weeks

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

Universidad de los Andes
Skills you'll gain: TypeScript, Javascript, Scripting, Scripting Languages, Hypertext Markup Language (HTML)
Intermediate · Guided Project · Less Than 2 Hours

Coursera
Skills you'll gain: Ajax, JSON, Javascript, Application Programming Interface (API), Web Applications, Secure Coding, Application Security
Intermediate · Course · 1 - 4 Weeks