Free courses can help you learn coding languages like Python and JavaScript, data analysis techniques, and web development fundamentals. You can build skills in problem-solving, algorithm design, and creating interactive websites. Many courses introduce tools such as Git for version control, SQL for database management, and various frameworks that streamline web development, allowing you to apply your skills in practical projects.

Skills you'll gain: Java Programming, Memory Management
Intermediate · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Secure Coding, Java Programming, Maintainability, Hardening, Java, Software Design Patterns, Application Security, Software Design, Data Structures, Object Oriented Design, Software Architecture, Performance Tuning, Memory Management, API Design, Object Oriented Programming (OOP), Web Servers, Application Programming Interface (API), Interoperability, Software Development, Virtualization
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Object Oriented Programming (OOP), Java Programming, Code Reusability, Java, Computer Programming, Data Validation, Data Integrity, Computer Science
★ 4.1 (21) · Intermediate · Course · 1 - 4 Weeks

Universidad Nacional Autónoma de México
Skills you'll gain: Java, Object Oriented Programming (OOP), Java Programming, Android Development, Android Studio, Mobile Development, Memory Management, Programming Principles
★ 4.7 (1.5K) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Performance Tuning, Data Structures, Java Programming, Java, Performance Testing, Application Performance Management, Database Architecture and Administration, Memory Management, Maintainability, Databases, AI Integrations, Software Testing, Microservices, Algorithms, Application Frameworks, Scalability, System Monitoring, SQL, Computer Programming Tools, Javascript
Intermediate · Course · 3 - 6 Months

University of Michigan
Skills you'll gain: Memory Management, C++ (Programming Language), C (Programming Language), Object Oriented Programming (OOP), Object Oriented Design, Data Structures, Python Programming, Java Programming, Java, Performance Tuning
★ 4.5 (14) · Intermediate · Course · 1 - 3 Months
Skills you'll gain: Data Structures, Feature Engineering, MLOps (Machine Learning Operations), Java Programming, Java, Performance Tuning, Data Processing, System Monitoring, Model Training, Scalability, Performance Analysis, Memory Management, Benchmarking, Program Implementation
Advanced · Course · 1 - 4 Weeks

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

Skills you'll gain: Secure Coding, Maintainability, Hardening, Java Programming, Software Design Patterns, Application Security, Software Design, Java, Software Architecture, Memory Management, API Design, Software Development, Object Oriented Programming (OOP), Application Programming Interface (API), Interoperability, C (Programming Language)
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Java Programming, Development Environment, Program Development, Computer Programming, Programming Principles, Data Structures, Java, Integrated Development Environments, Maintainability, Code Reusability, Memory Management, Computational Logic, Debugging, Command-Line Interface, Problem Solving
Beginner · Course · 3 - 6 Months

Codio
Skills you'll gain: Algorithms, Data Structures, Java, Java Programming, Computer Programming
★ 3.6 (10) · Intermediate · Course · 1 - 4 Weeks
Skills you'll gain: Model Deployment, Containerization, Performance Tuning, Memory Management, Docker (Software), Java, Java Programming, Artificial Intelligence and Machine Learning (AI/ML), Analysis, Data Structures
Advanced · Course · 1 - 4 Weeks