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.

EDUCBA
Skills you'll gain: File I/O, Object Oriented Programming (OOP), Java Programming, Data Structures, Java, Data Persistence, Programming Principles, Data Store, Persistence
★ 5 (13) · Intermediate · Course · 1 - 4 Weeks

Universidad de los Andes
Skills you'll gain: Java, Object Oriented Design, Java Programming, Code Reusability, Object Oriented Programming (OOP), Data Structures, Computer Programming, User Interface (UI), UI Components, Programming Principles, Algorithms, Program Development, Debugging
★ 4.6 (300) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Java Platform Enterprise Edition (J2EE), Java Programming, Object-Relational Mapping, Java, Application Servers, Middleware, Application Deployment, Data Persistence, Event-Driven Programming, Enterprise Application Management, Server Side, Data Access, Code Reusability, Context Management, Business Logic, Query Languages, Remote Access Systems
★ 4.8 (60) · Intermediate · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Java Programming, Object Oriented Programming (OOP), Object Oriented Design, Java, Code Reusability, Maintainability, Programming Principles, Computer Programming, Application Development, Android Development, Memory Management
★ 4.4 (35) · Beginner · Course · 1 - 4 Weeks
Instituto Tecnológico de Aeronáutica
Skills you'll gain: JUnit, Object Oriented Programming (OOP), Java, Java Programming, Object Oriented Design, Unified Modeling Language, Unit Testing, Agile Software Development, Software Design, Software Development, Computer Programming, Test Case, Software Testing, Diagram Design, Programming Principles
★ 4.8 (1.1K) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Apache Maven, File I/O, Build Tools, Data Import/Export, Object Oriented Programming (OOP), JSON, Java Programming, Debugging, Object Oriented Design, JUnit, Code Reusability, Software Documentation, Programming Principles, Data Structures, File Systems, Computer Programming, Web Services, File Management, Java, Computer Science
★ 4.5 (197) · Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Eclipse (Software), Integrated Development Environments, Java Programming, Java, Object Oriented Programming (OOP), Development Environment, Programming Principles, Computer Programming Tools, Software Development Tools, Software Installation, Debugging, Computer Programming, Computing Platforms
★ 4.5 (14) · Beginner · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Angular, HTML and CSS, JavaScript Frameworks, Hypertext Markup Language (HTML), Application Frameworks, Front-End Web Development, Javascript, Software Design Patterns, Java, Web Components, Code Reusability, Web Applications, Full-Stack Web Development, Cascading Style Sheets (CSS), Programming Principles, Web Design, Maintainability, Web Development, UI Components
★ 4.4 (117) · Intermediate · Course · 1 - 4 Weeks

Duke University
Skills you'll gain: Object Oriented Programming (OOP), Java, Object Oriented Design, Java Programming, Software Engineering, Programming Principles, Computer Programming, Software Development Tools, Software Design, Predictive Modeling, Algorithms, Data Structures, Markov Model, Performance Tuning, Performance Testing, File I/O, Debugging, Application Programming Interface (API)
★ 4.6 (1.5K) · Beginner · Course · 1 - 3 Months

Peking University
Skills you'll gain: Java Programming, Java, Program Development, Programming Principles, Computer Programming, Maintainability, Database Development, Object Oriented Programming (OOP), JUnit, Database Application, UI Components, C and C++, Data Access, Object Oriented Design, User Interface (UI), Application Development, Event-Driven Programming, File I/O, Data Structures
★ 4.7 (210) · Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Object Oriented Programming (OOP), Java, Object Oriented Design, Java Programming, Computer Programming
★ 4.6 (54) · Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: File I/O, Data Import/Export, Java Programming, Java, Programming Principles, Computer Programming, Data Structures, File Systems, File Management, Data Store, Computer Science
★ 4.6 (45) · Beginner · Course · 1 - 4 Weeks