Java Mini Project Tutorial: Build a Simple Student Management System

Author: Gursehbaj Singh | Blog: DevMode

In this tutorial, we will build a simple Student Management System using Java. This project helps you understand classes, objects, arrays, methods, loops, and basic exception handling. By the end, you'll have a working console-based system to manage students.

Project Overview

Our Student Management System will allow you to:

• Add new students
• View all students
• Search student by ID
• Delete a student
• Update student information

Step 1: Create Student Class

class Student {
    int id;
    String name;
    int age;
    
    Student(int id, String name, int age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }
    
    void display() {
        System.out.println("ID: " + id + ", Name: " + name + ", Age: " + age);
    }
}

Step 2: Main Class & Menu

import java.util.Scanner;
import java.util.ArrayList;

public class StudentManagement {
    static ArrayList students = new ArrayList<>();
    static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) {
        while(true) {
            System.out.println("\n=== Student Management System ===");
            System.out.println("1. Add Student");
            System.out.println("2. View All Students");
            System.out.println("3. Search Student");
            System.out.println("4. Update Student");
            System.out.println("5. Delete Student");
            System.out.println("6. Exit");
            System.out.print("Enter your choice: ");
            int choice = sc.nextInt();
            
            switch(choice) {
                case 1: addStudent(); break;
                case 2: viewStudents(); break;
                case 3: searchStudent(); break;
                case 4: updateStudent(); break;
                case 5: deleteStudent(); break;
                case 6: System.exit(0);
                default: System.out.println("Invalid choice!"); 
            }
        }
    }

Step 3: Add Student Method

static void addStudent() {
    System.out.print("Enter ID: ");
    int id = sc.nextInt();
    sc.nextLine(); // consume newline
    System.out.print("Enter Name: ");
    String name = sc.nextLine();
    System.out.print("Enter Age: ");
    int age = sc.nextInt();
    
    Student s = new Student(id, name, age);
    students.add(s);
    System.out.println("Student added successfully!");
}

Step 4: View All Students Method

static void viewStudents() {
    if(students.isEmpty()) {
        System.out.println("No students found.");
        return;
    }
    for(Student s : students) {
        s.display();
    }
}

Step 5: Search Student Method

static void searchStudent() {
    System.out.print("Enter Student ID to search: ");
    int id = sc.nextInt();
    for(Student s : students) {
        if(s.id == id) {
            s.display();
            return;
        }
    }
    System.out.println("Student not found!");
}

Step 6: Update Student Method

static void updateStudent() {
    System.out.print("Enter Student ID to update: ");
    int id = sc.nextInt();
    sc.nextLine();
    
    for(Student s : students) {
        if(s.id == id) {
            System.out.print("Enter new Name: ");
            s.name = sc.nextLine();
            System.out.print("Enter new Age: ");
            s.age = sc.nextInt();
            System.out.println("Student updated successfully!");
            return;
        }
    }
    System.out.println("Student not found!");
}

Step 7: Delete Student Method

static void deleteStudent() {
    System.out.print("Enter Student ID to delete: ");
    int id = sc.nextInt();
    
    for(int i = 0; i < students.size(); i++) {
        if(students.get(i).id == id) {
            students.remove(i);
            System.out.println("Student deleted successfully!");
            return;
        }
    }
    System.out.println("Student not found!");
}

Step 8: Run and Test

Compile and run the program. Test adding, viewing, searching, updating, and deleting students. The console menu should guide you.

Step 9: Best Practices

• Use ArrayList for dynamic storage
• Use methods to organize code
• Validate user input to avoid errors
• Add exception handling if needed

Conclusion

This mini project teaches you how to apply Java basics like classes, objects, arrays, loops, methods, and exception handling in a practical way. You can expand it by adding file storage, GUI, or more features. Practicing mini projects like this will make you a confident Java programmer!