Core Java courses can help you learn object-oriented programming, exception handling, multithreading, and Java Collections. 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.

Coursera
Skills you'll gain: Java, Data Structures, Java Programming, Data Access, Data Cleansing
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Data Access, Database Design, Relational Databases, Object Oriented Programming (OOP), JUnit, SQL, Java, Java Programming, Database Management, Databases
Beginner · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Java, Application Development, Java Programming, Software Engineering, Microsoft Visual Studio, Algorithms
Intermediate · Guided Project · Less Than 2 Hours

Coursera
Skills you'll gain: Java, Java Programming, Algorithms, Computational Thinking, Programming Principles, Object Oriented Programming (OOP), Computer Programming, Functional Design, Development Environment
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Selenium (Software), Java Programming, Java, Object Oriented Programming (OOP), Object Oriented Design, Eclipse (Software), File Management, Cascading Style Sheets (CSS), Extensible Markup Language (XML), Test Automation, Computer Programming, Development Environment, Integrated Development Environments, Software Testing, Web Scraping, Apache, Test Case, Javascript and jQuery, Browser Compatibility, Data Structures
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: ASP.NET, Restful API, Object-Relational Mapping, Web Applications, User Accounts, Single Sign-On (SSO), .NET Framework, API Design, Application Programming Interface (API), Database Application, Authentications, Back-End Web Development, Performance Tuning, Authorization (Computing), Data Management, Relational Databases, Identity and Access Management, Model View Controller, Multi-Factor Authentication, Data Security
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Hardware Troubleshooting, Desktop Support, Network Troubleshooting, Computer Hardware, Networking Hardware, System Configuration, Technical Support and Services, Network Administration, Computer Displays, Peripheral Devices, Data Storage, Display Devices
Advanced · Course · 1 - 3 Months

Universidad de Palermo
Skills you'll gain: Object Oriented Design, Object Oriented Programming (OOP), Java, Software Design, Software Design Patterns, Programming Principles, Software Development
Intermediate · Course · 1 - 4 Weeks

University of California San Diego
Skills you'll gain: Graph Theory, Data Structures, Java Programming, Java, Object Oriented Design, Software Design, Algorithms, Object Oriented Programming (OOP), Network Routing, Computational Thinking, Application Development, Debugging
Intermediate · Course · 1 - 3 Months

Skills you'll gain: PyTorch (Machine Learning Library), Deep Learning, Machine Learning, Supervised Learning, Artificial Neural Networks, Artificial Intelligence, Python Programming, Regression Analysis, Software Installation, System Configuration, Development Environment, Performance Tuning
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Data Structures, Graph Theory, Algorithms, Java, Theoretical Computer Science, Computer Programming, Object-Relational Mapping, Computational Thinking, Programming Principles, Performance Tuning
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: ASP.NET, Model View Controller, .NET Framework, Object-Relational Mapping, Data Access, Full-Stack Web Development, Web Development, Web Applications, Database Development, Software Architecture, Software Design Patterns, Dependency Analysis, User Interface (UI)
Intermediate · Course · 1 - 3 Months