Java Programming: Core Java & Object-Oriented Coding | Guide 2026

This comprehensive Java Programming course notes e-book takes learners from their very first Java class to advanced core programming and Object-Oriented Programming concepts. The course follows a practical, step-by-step approach, beginning with Java fundamentals and gradually introducing programming logic, arrays, strings, methods, OOP, collections, exception handling, and file handling. Every concept is supported with practical programs so learners can understand how Java code works in a real development environment. The examples are designed to build strong programming fundamentals while gradually introducing the concepts used in real Java applications. What You Will Learn Introduction to Java programming Java program structure and your first class Variables and data types Operators and expressions Input using Scanner Conditional statements for, while, and do-while loops Arrays Strings and string operations Methods and reusable code Classes and objects Constructors Encapsulation Inheritance Polymorphism Abstraction and interfaces Java Collections Framework Exception handling File handling Practical object-oriented programming Writing and running Java programs Practical Learning Every program is run and tested using JDK 21 (LTS), allowing learners to understand actual Java execution and output rather than learning only from theoretical examples. The course works with popular Java development environments including: JDK 21 / JDK 25 VS Code IntelliJ IDEA BlueJ This course is suitable for school and college students, beginners, computer science learners, and anyone looking to build a strong foundation in Core Java and Object-Oriented Programming.