Java Programming Study Materials

Java is a strongly typed, object-oriented, platform-independent programming language that compiles to bytecode and runs on the JVM.

Object-Oriented Programming in Java organises code as objects (instances of classes) that encapsulate data and behaviour, supporting inheritance, polymorphism, and abstraction.

Exception handling in Java is a mechanism using try-catch-finally and throws/throw to handle runtime errors gracefully without crashing the program.

The Java Collections Framework provides reusable data structures (List, Set, Map, Queue) and algorithms that operate on them through a unified interface.

Multithreading allows concurrent execution of two or more threads within a single Java program, enabling efficient CPU utilisation and responsive applications.

Byte and character streams, FileReader, FileWriter, BufferedReader, and serialisation.

Connecting Java to MySQL, CRUD operations, PreparedStatement, ResultSet, and transactions.

Lambda expressions, Stream API, Optional, default methods, and functional interfaces.

Creational (Singleton, Factory), structural (Adapter, Decorator), and behavioural (Observer, Strategy) patterns.

IoC, dependency injection, Spring Boot, REST controllers, and JPA basics.

Top Java interview questions, coding challenges, system design basics, and best practices.

Implementing linked lists, stacks, queues, trees, graphs, and heaps in Java.