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This repository encompasses a comprehensive collection of core Java code, providing a thorough resource for developers seeking to enhance their proficiency in Java programming.

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Core Java Repository

Welcome to the Core Java Repository! This repository is a comprehensive guide to Core Java, covering a wide range of topics essential for Java developers. Whether you are a beginner or an experienced developer, this repository aims to provide valuable resources, examples, and explanations to enhance your understanding of Core Java concepts.

Table of Contents

  1. Introduction
  2. Getting Started
  3. Basic Concepts
  4. Object-Oriented Programming (OOP)
  5. Exception Handling
  6. Collections Framework
  7. Multithreading
  8. File I/O
  9. Java Database Connectivity (JDBC)
  10. Java Standard Edition (SE) APIs
  11. Advanced Topics
  12. Best Practices
  13. Sample Programs
  14. Contributing
  15. License

Introduction

Core Java is the foundation of Java programming. It includes the basic concepts of the Java language, object-oriented programming, exception handling, and various APIs provided by Java Standard Edition (SE). This repository serves as a guide to mastering Core Java concepts.

Getting Started

Basic Concepts

Variables

In Java, a variable is a container that holds data. There are different types of variables, including primitive types and reference types.

Data Types

Java supports various data types such as int, float, double, char, boolean, etc. Understanding data types is crucial for variable declaration and manipulation.

Operators

Operators are symbols used to perform operations on variables and values. Examples include arithmetic, comparison, and logical operators.

Control Flow Statements

Control flow statements, such as if, switch, for, while, and do-while, control the flow of execution in a Java program.

Object-Oriented Programming (OOP)

Classes and Objects

Classes are the blueprint for objects, and objects are instances of classes. Learn about class and object creation, constructors, and methods.

Inheritance

Inheritance is a key OOP concept that allows a class to inherit properties and behaviors from another class. Explore single and multiple inheritance.

Polymorphism

Polymorphism allows objects to be treated as instances of their parent class. Learn about method overloading and overriding.

Encapsulation

Encapsulation is the bundling of data and methods that operate on the data within a single unit, or class.

Abstraction

Abstraction involves hiding the implementation details and exposing only the necessary features of an object.

Exception Handling

Exception handling in Java helps manage runtime errors gracefully. Learn about try-catch blocks, throw, throws, and finally.

Collections Framework

Lists

Lists are dynamic arrays that store elements in a specific order. Explore ArrayList, LinkedList, and Vector.

Sets

Sets store unique elements and do not allow duplicates. Learn about HashSet, LinkedHashSet, and TreeSet.

Maps

Maps store key-value pairs. Explore HashMap, TreeMap, and LinkedHashMap.

Iterators

Iterators provide a way to traverse through collections. Learn about Iterator and ListIterator.

Multithreading

Thread Creation

Creating threads allows concurrent execution of tasks. Learn about extending the Thread class and implementing the Runnable interface.

Synchronization

Synchronization ensures that only one thread accesses shared resources at a time. Learn about synchronized methods and blocks.

Concurrency

Concurrency involves executing multiple threads simultaneously. Learn about Executor framework and Callable.

File I/O

Reading and Writing Files

File I/O operations include reading from and writing to files. Learn about FileReader, FileWriter, BufferedReader, and BufferedWriter.

Serialization

Serialization is the process of converting objects into a byte stream. Learn about Serializable interface and ObjectInputStream, ObjectOutputStream.

Java Database Connectivity (JDBC)

Connecting to a Database

Connecting to a database involves establishing a connection using DriverManager and Connection.

Executing SQL Queries

Executing SQL queries involves creating statements, result sets, and handling transactions.

Java Standard Edition (SE) APIs

java.util Package

The java.util package provides utility classes and data structures like ArrayList, HashMap, and Date.

java.lang Package

The java.lang package contains fundamental classes and provides support for threads, strings, exceptions, and more.

java.io Package

The java.io package provides classes for reading and writing to files, streams, and serialization.

Advanced Topics

Lambda Expressions

Lambda expressions enable functional programming in Java. Learn about the syntax and usage of lambdas.

Streams API

The Streams API facilitates functional-style operations on streams of elements. Learn about map, filter, reduce, and collect operations.

JavaFX

JavaFX is a platform for creating desktop applications. Learn about building graphical user interfaces (GUI) using JavaFX.

Java 9+ Features

Explore new features introduced in Java 9 and later versions, including module system, private methods in interfaces, and more.

Best Practices

Adopting best practices ensures clean, maintainable, and efficient code. Learn about naming conventions, code organization, and design principles.

Sample Programs

Explore a collection of sample programs covering various Core Java concepts. These programs serve as practical examples to reinforce your understanding.

Contributing

Contributions to this repository are welcome! If you have additional topics, examples, or improvements, feel free to open an issue or create a pull request.

License

This Core Java Repository is open-source and available under the MIT License. License: MIT