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.

Skills you'll gain: Hypertext Markup Language (HTML), HTML and CSS, Web Design and Development, Web Development, Browser Compatibility, Web Design, Cascading Style Sheets (CSS), Web Content Accessibility Guidelines, Frontend Integration, Computer Graphics, Front-End Web Development, Semantic Web, Web Content, Usability, Javascript, User Experience, Data Validation
★ 4.7 (13) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Azure DevOps, Cloud Services, Cloud API, Application Programming Interface (API)
★ 4.9 (11) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Algorithms, Data Structures, Javascript, Computational Thinking, Programming Principles, Graph Theory, Solution Design
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Git (Version Control System), Selenium (Software), Version Control, GitHub, Jenkins, Continuous Integration, CI/CD, Test Automation, Web Development Tools, Browser Compatibility, Test Data, File I/O, Data Access
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Test Automation, Selenium (Software), Test Script Development, Unit Testing, Test Case, Software Testing, Test Execution Engine, Test Data, Apache Maven, Automation, Java, Maintainability, Code Reusability, Extensible Markup Language (XML)
Beginner · Course · 1 - 3 Months

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

★ 4.9 (21) · Intermediate · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: React.js, Code Reusability, UI Components, Maintainability, Javascript, Software Design Patterns, Programming Principles, Context Management
Advanced · Course · 1 - 4 Weeks

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

Board Infinity
Skills you'll gain: React Native, Mobile Development, Responsive Web Design, Cross Platform Development, Mobile Development Tools, UI Components, Application Development, Ajax, User Interface (UI), React.js, JavaScript Frameworks, Data Persistence, Data Store, Data Storage Technologies, Context Management, Development Environment, Javascript, Data Management
Intermediate · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Agentic Workflows, Tool Calling, Agentic systems, AI Workflows, Google Gemini, AI Orchestration, Server Side, Gemini, Generative AI Agents, AI Integrations, Back-End Web Development, LLM Application, OpenAI API, Node.JS, Large Language Modeling, Web Development, PostgreSQL, Data Processing, Data Modeling, Javascript
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Javascript, Event-Driven Programming, Web Development, HTML and CSS, Scripting, Web Applications, Hypertext Markup Language (HTML), Programming Principles, Front-End Web Development, Interactive Design
Beginner · Course · 1 - 4 Weeks