Core Java

Core Java refers to the basic features and components of the Java programming language. It forms the foundation for developing Java applications and provides the fundamental building blocks for creating robust and scalable software solutions.

Here are some key aspects and concepts related to Core Java:

  1. Object-Oriented Programming (OOP): Java is an object-oriented programming language, and Core Java emphasizes OOP principles such as encapsulation, inheritance, and polymorphism. It allows developers to create modular, reusable, and maintainable code.
  2. Syntax and Basic Constructs: Core Java includes the syntax and basic constructs of the Java language, including variables, data types, operators, control flow statements (if-else, loops), arrays, and exception handling. These fundamental elements enable developers to write code and control program execution.
  3. Classes and Objects: In Java, everything is based on classes and objects. Core Java teaches you how to define classes, create objects, and work with class members like fields, methods, and constructors. It also covers topics like access modifiers (public, private, protected), static members, and the “this” keyword.
  4. Packages and Imports: Java uses packages to organize classes into namespaces. Core Java introduces package creation, importing classes from other packages, and handling package visibility.
  5. Inheritance and Polymorphism: Inheritance is a key concept in Core Java, allowing classes to inherit properties and behaviors from other classes. Polymorphism enables objects of different classes to be treated as objects of a common superclass, facilitating code flexibility and extensibility.
  6. Interfaces: Interfaces define contracts that classes can implement, specifying a set of methods they must provide. Core Java covers interface declaration, implementation, and usage, enabling abstraction and multiple inheritance-like behavior.
  7. Exception Handling: Core Java teaches you how to handle exceptions, which are runtime errors or exceptional conditions. It includes try-catch blocks, throwing and catching exceptions, creating custom exceptions, and managing exception hierarchies.
  8. Input and Output (I/O): Core Java covers basic input and output operations, such as reading from and writing to files, streams, and the console. It introduces classes like FileReader, FileWriter, BufferedReader, BufferedWriter, etc.
  9. Multithreading: Java supports concurrent programming through threads. Core Java introduces the concept of threads, synchronization, thread creation, thread states, and thread coordination using techniques like locks, conditions, and wait-notify mechanisms.
  10. Collections Framework: Core Java covers the Java Collections Framework, which provides pre-implemented data structures and algorithms for storing, managing, and manipulating groups of objects. It includes classes like ArrayList, LinkedList, HashMap, HashSet, etc.