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.

LearnQuest
Skills you'll gain: Agentic Workflows, Generative AI Agents, Agentic systems, AI Workflows, AI Enablement, Responsible AI, Artificial Intelligence, AI Security, Technical Communication, Automation, AI Integrations, Workflow Management, Risk Analysis, Business Workflow Analysis, Process Mapping, Governance
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Object Oriented Design, Object Oriented Programming (OOP), Programming Principles, Computer Programming, Python Programming, Computer Science
★ 4.5 (66) · Intermediate · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: TypeScript, Javascript, Functional Design, Code Reusability, Object Oriented Programming (OOP), Programming Principles, Web Development Tools, Data Structures, Development Environment, Maintainability, System Configuration, Enterprise Application Management
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Spring Framework, Spring Boot, Model View Controller, Hibernate (Java), Java, Java Programming, Web Development, Web Applications, Secure Coding, Application Frameworks, Object-Relational Mapping, Application Deployment, Application Security, Database Application, Database Development, Software Development Tools, Authentications, Development Environment, Data Access, Authorization (Computing)
Intermediate · Course · 3 - 6 Months

Imperial College London
Skills you'll gain: Mathematical Modeling, Statistical Modeling, Simulations, Epidemiology, Infectious Diseases, R Programming, Public Health and Disease Prevention, Model Evaluation, Predictive Modeling, R (Software), Public Health
★ 4.5 (31) · Intermediate · Course · 1 - 4 Weeks

Pontificia Universidad Católica del Perú
Skills you'll gain: Data Preprocessing, Business Analytics, Dimensionality Reduction, Data Processing, Analytics, Data Cleansing, Data Transformation, Anomaly Detection, Project Management Life Cycle, Databases, R (Software), R Programming, Data Analysis, Data Quality, Big Data, Supervised Learning
★ 4.3 (65) · Beginner · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Social Network Analysis, Network Analysis, Graph Theory, R (Software), Social Sciences, Statistical Analysis, R Programming, Statistical Software, Sociology, Network Model, Statistical Modeling, Statistical Hypothesis Testing, Statistical Methods, Dependency Analysis
★ 4.3 (13) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Technical Analysis, Data Literacy, Financial Trading, Financial Market, Descriptive Statistics, Market Data, Statistics, Portfolio Risk, Statistical Methods, Derivatives, Risk Modeling, Market Analysis, Statistical Analysis, Market Dynamics, Securities Trading, Risk Analysis, Verification And Validation, Securities (Finance), Data Analysis, International Finance
★ 4.5 (41) · Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Quality Management, Continuous Quality Improvement (CQI), Quality Management Systems, Quality Improvement, Continuous Improvement Process, Supplier Quality Management, Product Quality (QA/QC), Quality Assurance and Control, Quality Assessment, Service Improvement, Quality Assurance, Supplier Management, Drive Engagement, Quality Control, Corrective and Preventive Action (CAPA), Customer experience improvement, Employee Engagement, Supplier Relationship Management, Process Management, Manufacturing Processes
★ 4.8 (38) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Restful API, Android Development, Kotlin, API Design, Android Studio, Application Programming Interface (API), Android Jetpack, Mobile Development, Database Application, Database Management, Data Persistence, Databases, JSON, Database Development, Web Applications, Back-End Web Development, SQL, Data Access, Relational Databases
★ 4.7 (62) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Object Oriented Programming (OOP), Java Programming, Java, Object Oriented Design, Data Structures, Computer Programming, Code Reusability
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Prompt Engineering, Prompt Patterns, Retrieval-Augmented Generation, LLM Application, Generative AI Agents, AI Workflows, LangChain, Model Context Protocol, Vector Databases, AI Orchestration, Agentic Workflows, Tool Calling, Artificial Intelligence and Machine Learning (AI/ML), LangGraph, Large Language Modeling, Agentic systems, Embeddings, Model Deployment, Artificial Intelligence, Application Performance Management
★ 2.3 (8) · Intermediate · Specialization · 1 - 3 Months