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.

Board Infinity
Skills you'll gain: Hibernate (Java), Multi-Tenant Cloud Environments, Object-Relational Mapping, Spring Boot, Performance Tuning, Java Programming, Java, Data Mapping
Intermediate · Course · 1 - 4 Weeks

Google Cloud
Skills you'll gain: Cloud Applications, Cloud Development, Cloud-Native Computing, Google Cloud Platform, Cloud API, Application Development, Data Store, Cloud Hosting, Cloud Storage, Cloud Services, Software Development, Data Storage, Cloud Platforms
★ 4.4 (29) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Project Scoping, Communication Planning, Scope Management, Quality Management, Resource Planning, Project Risk Management, IT Management, Stakeholder Management, Cost Management, Risk Management, Communication Strategies, Resource Allocation, Project Management, Leadership and Management, Resource Management, Cost Estimation, Stakeholder Engagement, Scheduling, Risk Mitigation, Information Technology
★ 4.5 (8) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Project Management Software, Sprint Planning, Project Planning, Project Management, Workflow Management, Organizational Skills, Collaborative Software, Team Management
★ 4.7 (44) · Beginner · Guided Project · Less Than 2 Hours
Skills you'll gain: Team Building, Team Leadership, Team Management, Team Collaboration, Teamwork, Trustworthiness, People Management, Collaboration, Cross-Functional Team Leadership, Leadership, Cross-Functional Collaboration, Professional Development, Empathy, Conflict Management, Communication Strategies, Goal Setting, Communication, Adaptability
★ 4.6 (8) · Beginner · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: Integrated Development Environments, Web Applications, HTML and CSS, Python Programming, Javascript, Design
★ 4.3 (18) · Beginner · Course · 1 - 4 Weeks
Skills you'll gain: AI Security, Application Security, Secure Coding, DevSecOps, Security Testing, Vulnerability Scanning, Vulnerability Assessments, AI Personalization, Continuous Integration, Open Source Technology, CI/CD, MLOps (Machine Learning Operations), Dependency Analysis, Analysis, Program Implementation, Supply Chain
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Regulation and Legal Compliance, Legal Risk, Compensation Management
★ 4.7 (20) · Intermediate · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: Rust (Programming Language), Memory Management, Application Programming Interface (API), Server Side, Code Reusability, Back-End Web Development, System Programming, Web Frameworks, Web Development, Other Programming Languages, Web Servers, Software Documentation, Scalability, Integrated Development Environments, Build Tools, Data Analysis, Maintainability, Network Protocols, Application Development
★ 3.7 (28) · Intermediate · Specialization · 1 - 3 Months

DeepLearning.AI
Skills you'll gain: LLM Application, Tool Calling, Large Language Modeling, Generative AI Agents, AI Workflows, Context Management, Memory Management, Prompt Engineering, Agentic systems, Data Persistence, System Design and Implementation
★ 4.6 (18) · Intermediate · Project · Less Than 2 Hours

Skills you'll gain: OAuth, Microservices, Spring Framework, Spring Boot, Containerization, Application Deployment, Apache Kafka, Development Testing, Software Testing, Docker (Software), Kubernetes, Unit Testing, Authentications, Integration Testing, Data Access, Software Architecture, Secure Coding, Restful API, Java Programming, Java
Intermediate · Course · 1 - 3 Months
Skills you'll gain: Jest (JavaScript Testing Framework), User Acceptance Testing (UAT), Cucumber (Software), Postman API Platform, Software Testing, Behavior-Driven Development, Selenium (Software), Test Driven Development (TDD), Performance Stress Testing, API Testing, Unit Testing, Performance Testing, Application Programming Interface (API), User Interface (UI), Javascript
★ 4.2 (15) · Beginner · Course · 1 - 4 Weeks