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.

University of Colorado Boulder
Skills you'll gain: Object Oriented Design, JUnit, Object Oriented Programming (OOP), Software Design Patterns, Software Engineering, Java, Unified Modeling Language, Software Design, Java Programming, Software Architecture, Model View Controller, Programming Principles, Conceptual Design
★ 4.6 (8) · Intermediate · Course · 1 - 3 Months

Scrimba
Skills you'll gain: Javascript, Application Programming Interface (API)
★ 4.9 (11) · Intermediate · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Apache Kafka, Apache, Data Pipelines, Distributed Computing, Scalability, File Systems, Data Store, Live Streaming, Data Persistence, File I/O, Data Storage Technologies, Command-Line Interface, Data Maintenance, Data Storage, Network Monitoring, File Management, Records Management
★ 4.2 (9) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Dashboard Creation, Dashboard, Data Preprocessing, Interactive Data Visualization, Data Visualization Software, Real Time Data, Data Analysis, Application Programming Interface (API), No-Code Development, JSON, Javascript
★ 4.3 (18) · Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Google Cloud Platform, Cloud Deployment, YAML, Restful API, Software Configuration Management, Load Balancing, Configuration Management
★ 4.9 (8) · Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Spring Framework, Java Programming, Java, Application Frameworks, Java Platform Enterprise Edition (J2EE), Maintainability, Scalability, Extensible Markup Language (XML)
★ 3.4 (8) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Javascript, Javascript and jQuery, Object Oriented Design, Scripting, Program Development, Web Applications, Scripting Languages, Computer Programming, Code Reusability, Hypertext Markup Language (HTML), Cascading Style Sheets (CSS), Prototyping, Context Management
★ 4.4 (8) · Beginner · Specialization · 3 - 6 Months
Skills you'll gain: Performance Tuning, Java, Memory Management, Computational Thinking, Algorithms, Java Programming, Data Structures, Scalability, Software Design Patterns, Programming Principles, Enterprise Architecture, Debugging, Management Consulting, Mitigation, Project Implementation
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: User Interface (UI), User Interface (UI) Design, Java, Java Programming, Application Design, Application Development, Database Development, Database Management, Databases, Data Persistence, Development Environment, Data Validation, Program Development, Configuration Management, Data Modeling, Data Integrity, Verification And Validation
Beginner · Course · 1 - 4 Weeks
Codio
Skills you'll gain: OAuth, Web Development Tools, Authentications, Web Servers, Application Programming Interface (API), API Design, Cloud API, Restful API, Server Side, Web Development, JSON, Software Documentation, Javascript, Web Services, Application Security
★ 4.5 (6) · Intermediate · Course · 1 - 4 Weeks
Coursera
Skills you'll gain: JUnit, MLOps (Machine Learning Operations), CI/CD, Continuous Integration, Jenkins, Test Automation, Unit Testing, Continuous Deployment, DevOps, Debugging, Code Coverage, Test Engineering, Data Pipelines, Test Data
Advanced · Course · 1 - 4 Weeks
École Polytechnique Fédérale de Lausanne
Skills you'll gain: Scala Programming, Functional Design, Programming Principles, Event-Driven Programming, Software Design Patterns, Data Structures, Simulations
★ 4.6 (11) · Intermediate · Course · 1 - 3 Months