This comprehensive course covers essential and advanced concepts in Java programming, using Java SE 21. It is designed to build a solid foundation in Java fundamentals, object-oriented programming, data handling, multithreading, and cloud-based Java applications. Through interactive lectures, hands-on labs, and exercises, participants will master the skills necessary to develop, maintain, and deploy Java applications effectively.This is an accelerated course aimed at experienced programmers. Learners who are new to programming should consider sitting a combination of OCJSE21PI 'Java SE 21: Programming I' and OCJSE21PII 'Java SE 21: Programming II' instead.