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.

Johns Hopkins University
Skills you'll gain: Regression Analysis, Statistical Hypothesis Testing, Statistical Analysis, Probability & Statistics, Statistical Methods, Probability Distribution, Data Analysis, Markov Model, Data Science, Statistics, Statistical Inference, Probability, R Programming
Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Google Gemini, Code Review, Application Deployment, Continuous Deployment, Responsible AI, Software Development Tools, Google Cloud Platform, Generative AI, Prompt Engineering, Debugging, Application Development
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Non-Verbal Communication, Assertiveness, Rapport Building, Executive Presence, Leadership, Interpersonal Communications, Business Leadership, Business Communication, Communication Strategies, Influencing, Trustworthiness
Mixed · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Intrusion Detection and Prevention, Threat Detection, Endpoint Detection and Response, Distributed Denial-Of-Service (DDoS) Attacks, Threat Management, Anomaly Detection, Continuous Monitoring, System Monitoring, Virtual Machines, Network Security, Event Monitoring, Network Monitoring, Network Analysis
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Oracle Cloud, Oracle Databases, Data Architecture, Data Migration, Database Administration, Data Lakes, Database Architecture and Administration, NoSQL, MySQL, JSON, Data Security, Analytics, Scalability
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: API Design, Restful API, Application Deployment, Spring Boot, Back-End Web Development, Data Modeling, Software Architecture, Object-Relational Mapping, System Configuration, Software Design, Application Development, Java Platform Enterprise Edition (J2EE), Business Logic
Mixed · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: Web Applications, Debugging, HTML and CSS, Web Development, Cascading Style Sheets (CSS), Mobile Development, Database Application, Hypertext Markup Language (HTML), Responsive Web Design, Real Time Data, User Interface (UI), Javascript, Data Management
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Generative Model Architectures, Generative AI, Site Reliability Engineering, Scalability, Application Design, Cloud Computing Architecture, Systems Architecture, Cloud Applications, Load Balancing, Cloud Platforms, Application Deployment, Distributed Computing, Enterprise Architecture, Artificial Intelligence and Machine Learning (AI/ML), Software Architecture, Infrastructure as Code (IaC), Containerization, Responsible AI, Continuous Monitoring, Security Engineering
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Bash (Scripting Language), Linux Commands, Shell Script, Unix Shell, Linux Servers, Linux Administration, Scripting, Network Troubleshooting, Scripting Languages, Command-Line Interface, Systems Administration, IT Automation, Virtual Machines, Virtualization, Software Installation, System Monitoring, File Management, User Accounts
Intermediate · Course · 1 - 3 Months

EDUCBA
Skills you'll gain: Extensible Markup Language (XML), Data Sharing, Interoperability, Information Architecture, Technical Documentation, Data Management, Data Validation
Beginner · Course · 1 - 4 Weeks

Universidad de los Andes
Skills you'll gain: Public Cloud, Big Data, Apache Hadoop, Apache Spark, Data Architecture, Cloud Services, Data Processing, Distributed Computing, Cloud Computing, Scalability, NoSQL, File Systems, Data Storage
Beginner · Course · 1 - 3 Months

Illinois Tech
Skills you'll gain: Cloud-Native Computing, Infrastructure as Code (IaC), Cloud Computing, Cloud Storage, Amazon Web Services, Cloud Infrastructure, Cloud Computing Architecture, Amazon S3, Amazon Elastic Compute Cloud, Database Management, Scalability, Virtual Machines, Command-Line Interface
Build toward a degree
Intermediate · Course · 1 - 3 Months