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.

Board Infinity
Skills you'll gain: Data Structures, Spring Boot, Restful API, Model View Controller, Spring Framework, Web Services, Java Programming, Java, Back-End Web Development, Authentications, Authorization (Computing), Algorithms, Application Security
★ 4.3 (163) · Advanced · Course · 1 - 4 Weeks

Duke University
Skills you'll gain: File I/O, Object Oriented Design, Java Programming, Object Oriented Programming (OOP), Data Structures, Java, Cryptography, Software Engineering, Computer Programming, Algorithms, Encryption, Data Store, Program Development, Web Analytics and SEO, Data Import/Export, Web Servers, File Management
★ 4.6 (3.2K) · Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Computer Programming, Object Oriented Design, Development Environment, Programming Principles, Data Structures
★ 4.4 (94) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: CI/CD, Integration Testing, Continuous Integration, Docker (Software), Java, Cloud Deployment, Containerization, Software Design Patterns, Microservices, Build Tools, Cloud-Native Computing, Object Oriented Design, Software Design, Functional Design
★ 4.8 (13) · Intermediate · Course · 1 - 4 Weeks

JetBrains
Skills you'll gain: Kotlin, Java Programming, Java, IntelliJ IDEA, Android Development, Mobile Development, Object Oriented Programming (OOP), Integrated Development Environments, Functional Design, Interoperability, Computer Programming, Programming Principles, Scripting, Unit Testing, Software Development, Development Environment, Code Review
★ 4.7 (2.1K) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Object Oriented Design, Computer Programming, Virtual Machines, Package and Software Management, Memory Management
★ 4.7 (535) · Beginner · Course · 1 - 4 Weeks

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, Code Reusability, Web Design and Development, 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

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: Spring Framework, Version Control, Spring Boot, Hibernate (Java), Object-Relational Mapping, GitHub, Git (Version Control System), Java Programming, Java, Software Configuration Management, Software Documentation, Development Environment, JUnit, Restful API, Application Performance Management, Model View Controller, Back-End Web Development, User Accounts, Authentications, Application Programming Interface (API)
★ 4.3 (8) · Intermediate · Course · 3 - 6 Months

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

EDUCBA
Skills you'll gain: Software Development
★ 4.9 (20) · Beginner · Course · 1 - 3 Months

Coursera
Skills you'll gain: Java, Data Structures, File I/O, Java Programming, Data Access, Data Cleansing
★ 4.6 (20) · Intermediate · Guided Project · Less Than 2 Hours