Welcome to the Java learning repository by Phitron.
This repo contains topic-wise examples, notes, and practice code for beginners to intermediate learners.

• Java syntax and programming fundamentals
• Control flow and arrays
• Classes, objects, encapsulation, inheritance, and interfaces
• Packages and nested classes
• File input/output
• GUI development with Swing

This repository currently includes modules 01 to 13:

01_Introduction_to_Java
02_Data_Types_Variables_and_Operators
03_control_statments
04_arrays
05_Classes_and_Objects
06_Class_Members
07_Encapsulation_and_Overloading
08_Inheritance_and_Polymorphism
09_Abstract_Classes_and_Interfaces
10_packages_access_modifers
11_nested_classes
12_file_input_output
13_GUI

• 01_Introduction_to_Java: Java basics, first program setup, and foundational syntax.
• 02_Data_Types_Variables_and_Operators: Primitive types, variable handling, and operators in practice.
• 03_control_statments: Conditional logic (if/else, switch) and loop patterns.
• 04_arrays: One-dimensional and multi-dimensional array fundamentals.
• 05_Classes_and_Objects: Class design, object creation, and core OOP structure.
• 06_Class_Members: Fields, methods, and member-level behavior inside classes.
• 07_Encapsulation_and_Overloading: Data hiding with encapsulation and method overloading concepts.
• 08_Inheritance_and_Polymorphism: Parent-child relationships and runtime polymorphic behavior.
• 09_Abstract_Classes_and_Interfaces: Abstraction design using abstract classes and interfaces.
• 10_packages_access_modifers: Package structure, access control, and modular code organization.
• 11_nested_classes: Inner/nested class usage and scope relationships.
• 12_file_input_output: File I/O with FileReader, FileWriter, BufferedReader, BufferedWriter, and IOException; includes bilingual tutorial and practice files.
• 13_GUI: Swing-based Notepad-style GUI (JFrame, JTextArea, menus, listeners), bilingual tutorial, and self-practice Open/Save tasks.

1. Install JDK (Java Development Kit).
2. Open this repository in VS Code (or any IDE).
3. Compile and run from terminal:

javac YourProgram.java
java YourProgram

Example:

cd 12_file_input_output
javac FileHandler.java
java FileHandler

• Read module readme.md first.
• Run the Java files manually from terminal.
• Modify code and test behavior.
• Implement pending practice tasks (especially in GUI and file I/O modules).

• Official Java Documentation
• VS Code
• Java Extension Pack for VS Code

• Md. Fatin Shadab Turja: GitHub
• Email: [email protected]

এই repository-টি University এবং Diploma level-এর শিক্ষার্থীদের জন্য Java শেখার একটি structured playlist।
এখানে topic অনুযায়ী code example, note, এবং practice task সাজানো আছে।

বর্তমানে 01 থেকে 13 পর্যন্ত module রয়েছে। বিশেষভাবে:

• 12_file_input_output-এ File I/O (FileReader, FileWriter, BufferedReader, BufferedWriter, IOException) শেখানো হয়েছে।
• 13_GUI-এ Java Swing দিয়ে basic Notepad-type app শেখানো হয়েছে।
• 12 এবং 13 module-এ bilingual (English + Bangla) tutorial যোগ করা হয়েছে।

শেখার ভালো উপায়:

1. প্রতিটি module-এর readme.md পড়ুন
2. কোড terminal থেকে compile/run করুন
3. নিজে পরিবর্তন করে output দেখুন
4. self-practice task (যেমন GUI Open/Save) implement করুন