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 California San Diego
Skills you'll gain: Debugging, Java, Teaching, Java Programming, Computer Programming, Programming Principles, Computational Logic, Computational Thinking, Education Software and Technology, Digital pedagogy
★ 2.8 (6) · Beginner · Course · 1 - 3 Months

The Linux Foundation
Skills you'll gain: Bash (Scripting Language), File Systems, Package and Software Management, Linux, Command-Line Interface, Unix Commands, Linux Commands, Shell Script, grep, Linux Administration, Unix Shell, Scripting, Software Development Tools, File Management, Build Tools, Unix, Scripting Languages, Program Development, System Programming, Operating Systems
★ 4.6 (734) · Beginner · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Java Programming, Java, OS Process Management, Memory Management, Data Sharing
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: JUnit, Unit Testing, IntelliJ IDEA, Apache Maven, Software Testing, Test Case, Java Programming, Integrated Development Environments, Java, Business Logic, Data Persistence
★ 4.8 (8) · Intermediate · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Angular, JavaScript Frameworks, Unit Testing, Ajax, Cloud Applications, Web Applications, Web Components, Front-End Web Development, Web Development, Javascript, Code Reusability, Hypertext Markup Language (HTML), UI Components
★ 4.8 (1.9K) · Intermediate · Course · 1 - 3 Months
Skills you'll gain: Server Side, Node.JS, Restful API, Database Design, Front-End Web Development, React Redux, Ajax, Database Development, Database Application, Full-Stack Web Development, Back-End Web Development, NoSQL, Javascript, React.js, Performance Tuning, API Design, Data Structures, MongoDB, Debugging, JavaScript Frameworks
★ 4.4 (1.4K) · Beginner · Specialization · 3 - 6 Months

Instituto Tecnológico de Aeronáutica
Skills you'll gain: User Story, Agile Software Development, Backlogs, Agile Methodology, Scrum (Software Development), Sprint Retrospectives, Agile Product Development, Test Driven Development (TDD), Agile Project Management, Requirements Elicitation, Requirements Analysis, Sprint Planning, Software Development Methodologies, Program Development, Diagram Design, Software Development
★ 4.6 (221) · Intermediate · Course · 1 - 4 Weeks
University of London
Skills you'll gain: Computer Science, Debugging, Development Environment, Computer Systems, Web Applications, Arithmetic, Computer Literacy, General Networking, Javascript, Network Security, Computer Networking, Application Security, Computational Thinking, Visualization (Computer Graphics), Program Development, Applied Mathematics, Computer Programming, General Mathematics, Numerical Analysis, Problem Solving
★ 4.2 (1.6K) · Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Ajax, Test Tools, Build Tools, Object Oriented Design, Gherkin (Scripting Language), Test Script Development, Web Development Tools, Software Design Patterns, Test Data, Scripting, Data Structures, Package and Software Management, File I/O, Data Access, Automation, Cascading Style Sheets (CSS)
★ 4.3 (10) · Intermediate · Specialization · 3 - 6 Months

Meta
Skills you'll gain: Jest (JavaScript Testing Framework), React.js, Web Development Tools, JavaScript Frameworks, Code Reusability, Application Programming Interface (API), Unit Testing, UI Components, Front-End Web Development, Software Design Patterns, Javascript, Development Environment, Context Management
★ 4.6 (1.5K) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Data Structures, Graph Theory, Algorithms, Java Programming, Java, Data Management, Secure Coding, Theoretical Computer Science, Performance Tuning, Computer Programming
Intermediate · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Field-Programmable Gate Array (FPGA), Hardware Design, Laboratory Experience, Laboratory Reports, Application Specific Integrated Circuits, System Design and Implementation, Embedded Software, Embedded Systems, Electronic Hardware, Electronic Systems, Electrical and Computer Engineering, Eclipse (Software), Electronics Engineering, Test Case, Laboratory Testing, Test Script Development, Verification And Validation, Microarchitecture, Computer Architecture, Software Development
★ 4.5 (1.7K) · Intermediate · Specialization · 3 - 6 Months