Imported from vijaybarhate/Anudip (AGENTS.md). Install upstream with npx skills add vijaybarhate/Anudip. Copyright stays with the author.

AGENTS.md — Project Context for Future Agents

Project Overview

Anudip Java practice lab — a collection of Java programs covering Core Java, Collections (ArrayList, LinkedList, HashSet, HashMap), Arrays, and JDBC. Each lab topic has a corresponding .docx document in docs/ with the problem statement, code, and output.

Repository Structure

D:\Projects\Anudip/
├── core/              — Core Java: arrays, bubble sort, min/max, average, reverse
├── arrays/            — Array lab assignments (lab_ANP-D6592_Array)
├── collections/       — ArrayList & LinkedList programs (lab_6592_ArraylistnLinkedlist)
├── OOps/              — OOPs programs (encapsulation, student management system)
├── jdbc/              — JDBC CRUD programs (lab_ANP-D6592_JDBC_CRUD)
├── docs/              — Lab assignment .docx files with problem descriptions + code + output
├── assets/            — Screenshots and flowcharts
├── html/              — HTML/CSS practice files
├── AGENTS.md          — This file: session history and context for agents
├── README.md          — Project documentation with table of programs
├── notes.md           — Collection Framework, String, and OOPs reference notes
│
├── Hash_Map.java      — Basic HashMap demo (employee ID → name)
├── Hash_Set.java      — Basic HashSet demo (student names, uniqueness)
├── Linked_List.java   — Basic LinkedList demo (add, addFirst, addLast, get, remove)
├── Product.java       — Model class for ProductInventory (id, name, price, qty)
├── ProductInventory.java — HashMap lab: product CRUD with menu (lab_ANP-D6592_HashSet)
├── Student.java       — Model class for EventRegistration (id, name)
├── EventRegistration.java — HashSet lab: college event registration with menu
├── Reverse_str.java   — String reversal program
├── Palindrome.java    — Palindrome checker
├── EqStr.java         — String comparison & method demo
├── DuplicateChars.java — Duplicate character finder
├── DemoStr1.java      — String pool vs heap demo
└── CompareStrings.java — String comparison (3 methods)

Session History

Session 1 — HashSet Lab Document & Programs (2026-06-30)

What was done:

1. Created lab_ANP-D6592_HashSet.docx with:

   • Q1: Product Inventory Management using HashMap<Integer, Product> — menu-driven CRUD
   • Q2: College Event Registration using HashSet<Student> — with duplicate prevention
   • Both questions have CODE and OUTPUT sections in tables (matching format of other lab docx files)

2. Created source files:

   • Product.java — model class with equals()/hashCode() based on id
   • ProductInventory.java — menu-driven HashMap program with Add/Display/Search/Update/Delete

3. Updated EventRegistration.java to use HashSet<Student> with 9 pre-loaded students and full menu (Register/View/Check/Cancel/Count/Exit)

4. Added comprehensive JavaDoc-style comments to ALL .java files in the project

5. Updated notes.md — added Map hierarchy, HashSet/HashMap documentation with method tables and custom object guidelines

6. Created AGENTS.md — this file, for session history and project context

Session 2 — String Programs, OOPs Programs, & Documentation Update (2026-07-13)

What was done:

1. Added 6 new String programs:

   • Reverse_str.java — string reversal from user input
   • Palindrome.java — palindrome checker with space/case normalization
   • EqStr.java — == vs .equals() demo with charAt, toUpperCase, toLowerCase, contains, replace
   • DuplicateChars.java — duplicate character detection using HashMap<Character, Integer>
   • DemoStr1.java — string pool vs heap memory reference comparison
   • CompareStrings.java — comparison via equals(), equalsIgnoreCase(), compareTo()

2. Added OOPs programs directory (OOps/) with 5 programs:

   • Student.java — model class with id, name, course, marks
   • Student_management_system.java — POJO with getters/setters/toString
   • Studentman.java — full student management system using ArrayList, HashMap, HashSet, Queue, JDBC
   • encapsulation.java — encapsulation demo with employee object
   • employee.java — employee model class with getters/setters/toString

3. Updated notes.md — added String API section (pool vs heap, == vs equals(), common methods, StringBuilder) and OOPs Concepts section (class, object, encapsulation, constructor, this, toString)

4. Updated README.md — added String Programs section, OOPs Programs section, Linked_List.java entry, and updated Folder Structure

5. Updated AGENTS.md — this session entry

Session 3 — Classpath Configuration & Compilation Fixes (2026-07-14)

What was done:

1. Diagnosed package mismatch compilation errors where IDE expected default package "" for files with package OOps.DAO or OOps.Github.BankingSystem.
2. Updated .classpath to define the project root "" as the primary source folder (excluding specific lab dirs arrays/, collections/, core/, jdbc/, bin/, etc.) so that all files declaring package OOps... resolve correctly relative to the project root.
3. Configured arrays/, collections/, core/, and jdbc/ as separate source folders in .classpath so their Java files (which use the default package) compile without package mismatch errors.
4. Compiled and verified files in both packaged paths (e.g. BankingSystem.java, StudentMain.java) and default-packaged paths (e.g. ShoppingCart.java) to ensure zero errors.
5. Identified and removed untracked duplicate Java files from the project root directory (e.g. ShoppingCart.java, Average.java, etc.) that were causing "type already defined" conflicts with their counterparts in collections/, core/, and jdbc/.

Coding Conventions

• Class names: PascalCase (e.g., ProductInventory)
• File names: match class name exactly
• Package: default package (no package declarations)
• Comments: multi-line // comments explaining intent at class and method level, inline // for tricky logic
• Imports: specific imports preferred (e.g., import java.util.Scanner) but import java.util.* is also used
• Input: Scanner with System.in
• Menu pattern: do-while loop with switch statement

Lab Document Format

Each topic has a .docx in docs/ with naming convention: lab_<course-code>_<topic>.docx

Document structure:

1. Title (centered, bold, 14pt)
2. Question number and description (paragraphs)
3. "CODE:" label
4. Code in a 1×1 table
5. "OUTPUT:" label
6. Sample output in a 1×1 table
7. Separator line (─ × 50)
8. Repeat for Q2...

Verification

• Re-compile after any edit: javac FileName.java in project root
• No errors should appear on compilation
• All .java files have been compiled successfully after the last edits