Chapter 9: Capstone Project – Institute Placement Management System (IPMS)

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Introduction

Throughout this tutorial, we have learned:

• Java Fundamentals
• Object-Oriented Programming
• Inheritance
• Polymorphism
• Abstraction
• Interfaces
• Collections
• Generics
• Exception Handling
• File Handling
• Functional Programming
• Stream API
• Multithreading
• SOLID Principles
• Design Patterns

In this final chapter, we will apply all these concepts to build a complete enterprise-style application called:

Institute Placement Management System (IPMS)

This capstone project demonstrates how Java is used in real-world enterprise software development.

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Project Overview

IPMS helps educational institutions manage placement activities.

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Business Objectives

The system should:

• Register Students
• Manage Companies
• Manage Placement Drives
• Process Applications
• Track Interviews
• Generate Reports
• Send Notifications
• Provide Analytics

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Stakeholders

Stakeholder	Responsibilities
Student	Apply for Jobs
Recruiter	Conduct Hiring
TPO	Manage Placements
Administrator	Manage System

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System Features

Student Management

• Student Registration
• Profile Management
• Resume Upload
• Skills Management
• Academic Records

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Company Management

• Company Registration
• Job Posting
• Hiring Criteria
• Drive Scheduling

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Placement Drive Management

• Create Drive
• Publish Drive
• Accept Applications
• Schedule Interviews

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Reports

• Student Reports
• Placement Reports
• Company Reports
• Analytics Reports

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System Architecture Overview

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High Level Architecture

Presentation Layer

Business Layer

Data Layer

File System

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Technology Stack

Component	Technology
Language	Java 17
IDE	IntelliJ IDEA
Build Tool	Maven
Database	MySQL/PostgreSQL
Reporting	Java APIs
Concurrency	Executor Framework

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Project Structure

ipms
│
├── controller
│
├── service
│
├── repository
│
├── model
│
├── dto
│
├── util
│
├── exception
│
└── report

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Domain Model

The domain model represents core business entities.

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Core Entities

• Student
• Company
• PlacementDrive
• Application
• Interview
• User

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Domain Model Diagram

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Student Entity

public class Student {

    private Long studentId;

    private String name;

    private String email;

    private double cgpa;

    private String branch;
}

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Example Student

Student student =
        new Student();

student.setStudentId(101L);

student.setName(
        "John Doe");

student.setCgpa(8.75);

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Another Student

Student student2 =
        new Student();

student2.setStudentId(102L);

student2.setName(
        "Sara Elise");

student2.setCgpa(9.20);

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Company Entity

public class Company {

    private Long companyId;

    private String companyName;

    private String location;
}

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Example

Company company =
        new Company();

company.setCompanyName(
        "TechNova Solutions");

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Placement Drive Entity

public class PlacementDrive {

    private Long driveId;

    private String driveName;

    private LocalDate driveDate;
}

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Application Entity

public class Application {

    private Long applicationId;

    private Student student;

    private PlacementDrive drive;
}

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User Hierarchy

Using Inheritance.

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public abstract class User {

    protected String name;

    protected String email;
}

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Student User

public class Student
        extends User {

}

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Recruiter User

public class Recruiter
        extends User {

}

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Administrator User

public class Administrator
        extends User {

}

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Applying Interfaces

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Notification Interface

public interface NotificationService {

    void send(
            String message);
}

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Email Notification

public class EmailService
        implements NotificationService {

    @Override
    public void send(
            String message) {

        System.out.println(message);
    }
}

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SMS Notification

public class SmsService
        implements NotificationService {

    @Override
    public void send(
            String message) {

        System.out.println(message);
    }
}

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Repository Layer

Repository handles data access.

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Student Repository

public interface StudentRepository {

    void save(
            Student student);

    Student findById(
            Long id);
}

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Implementation

public class StudentRepositoryImpl
        implements StudentRepository {

}

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Service Layer

Business Logic Layer.

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Student Service

public class StudentService {

    private StudentRepository
            repository;
}

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Register Student

public void registerStudent(
        Student student) {

    repository.save(student);
}

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Controller Layer

Handles requests.

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Student Controller

public class StudentController {

    private StudentService
            service;
}

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Create Student

public void createStudent(
        Student student) {

    service.registerStudent(
            student);
}

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Layered Architecture

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Applying Collections

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Student List

List<Student> students =
        new ArrayList<>();

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Company List

List<Company> companies =
        new ArrayList<>();

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Skill Set

Set<String> skills =
        new HashSet<>();

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Company Map

Map<Long, Company> companies =
        new HashMap<>();

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Applying Generics

public interface Repository<T> {

    void save(T entity);

    T findById(Long id);
}

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Student Repository

public class StudentRepository
        implements Repository<Student> {

}

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Exception Handling

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Custom Exception

public class InvalidCgpaException
        extends Exception {

    public InvalidCgpaException(
            String message) {

        super(message);
    }
}

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Validation

if(student.getCgpa() < 0 ||
        student.getCgpa() > 10) {

    throw new InvalidCgpaException(
            "Invalid CGPA");
}

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File Export

Generate reports.

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CSV Export

BufferedWriter writer =
        new BufferedWriter(
                new FileWriter(
                        "students.csv"));

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Write Student

writer.write(
        "101,John Doe,8.75");

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Analytics using Stream API

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Eligible Students

students.stream()
        .filter(
                student ->
                        student.getCgpa() >= 7)
        .forEach(
                System.out::println);

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Top Students

students.stream()
        .sorted(
                Comparator.comparing(
                        Student::getCgpa)
                        .reversed());

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Average CGPA

double average =
        students.stream()
                .mapToDouble(
                        Student::getCgpa)
                .average()
                .orElse(0);

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Placement Analytics

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Applying Multithreading

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Notification Task

Runnable notificationTask =
        () ->
                System.out.println(
                        "Email Sent");

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Executor Service

ExecutorService executor =
        Executors.newFixedThreadPool(5);

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Execute Task

executor.submit(
        notificationTask);

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Generate Report

Callable<String> reportTask =
        () -> "Report Generated";

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Future Result

Future<String> result =
        executor.submit(
                reportTask);

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Applying SOLID Principles

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SRP

StudentService

CompanyService

ReportService

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OCP

ReportGenerator

Extended by:

PdfReportGenerator

ExcelReportGenerator

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DIP

StudentService

depends upon:

StudentRepository

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Applying Design Patterns

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Singleton

ConfigurationManager

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Factory

NotificationFactory

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Builder

StudentBuilder

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Strategy

EligibilityStrategy

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Notification Factory

NotificationService service =
        NotificationFactory
                .create("EMAIL");

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Student Builder

Student student =
        new StudentBuilder()
                .name("John Doe")
                .cgpa(8.75)
                .build();

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Eligibility Strategy

EligibilityStrategy strategy =
        new CgpaStrategy();

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Placement Workflow

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Sample Data

Students

ID	Name	CGPA
101	John Doe	8.75
102	Sara Elise	9.20
103	Michael Brown	7.85
104	Emily Carter	8.10

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Companies

ID	Company
1	TechNova Solutions
2	GlobalSoft Systems
3	FutureTech Labs

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Placement Eligibility Logic

public boolean eligible(
        Student student) {

    return student.getCgpa() >= 7;
}

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Sample Execution Flow

Student Registers
        ↓

Profile Validation
        ↓

Placement Drive Published
        ↓

Student Applies
        ↓

Eligibility Check
        ↓

Interview Scheduled
        ↓

Result Declared

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Future Enhancements

• Spring Boot REST APIs
• MySQL Integration
• Hibernate ORM
• JWT Security
• Docker Deployment
• Microservices
• Kafka Integration
• Cloud Deployment

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Mini Project Deliverables

Students should implement:

• Student Module
• Company Module
• Placement Drive Module
• Report Module
• Notification Module
• Analytics Module

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Best Practices

• Follow SOLID Principles
• Use Design Patterns
• Validate Inputs
• Handle Exceptions
• Use Collections Effectively
• Apply Generics
• Use Streams for Analytics
• Use Executor Framework for Background Tasks

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Learning Outcomes

After completing IPMS, students will be able to:

• Design Enterprise Applications
• Implement OOP Concepts
• Use Collections and Generics
• Handle Exceptions
• Process Data using Streams
• Build Concurrent Applications
• Apply SOLID Principles
• Apply Design Patterns

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Course Summary

Congratulations!

You have successfully completed:

• Java Fundamentals
• OOP
• Collections
• Generics
• Exception Handling
• File Handling
• Functional Programming
• Stream API
• Multithreading
• SOLID Principles
• Design Patterns

and applied them to build a complete enterprise-grade project:

Institute Placement Management System (IPMS)

This project serves as a strong foundation before learning:

• JDBC
• Spring Framework
• Spring Boot
• Hibernate
• Microservices
• Cloud-Native Java Development

Keep building, experimenting, and coding every day.

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