Java-project

import java.util.Scanner;

class StudentProject { int studentId; String name; int age; String department; String email; String phoneNumber; String address; int[] marks; int markCount;

StudentProject(int studentId, String name, int age, String department, String email, String phoneNumber, String address) { this.studentId = studentId; this.name = name; this.age = age; this.department = department; this.email = email; this.phoneNumber = phoneNumber; this.address = address; this.marks = new int[10]; // Maximum 10 marks per student this.markCount = 0; }

void addMark(int mark) { if (markCount < marks.length) { marks[markCount++] = mark; } else { System.out.println("Maximum marks limit reached!"); } }

double calculateAverage() { if (markCount == 0) return 0; int total = 0; for (int i = 0; i < markCount; i++) { total += marks[i]; } return (double) total / markCount; }

void displayDetails() { System.out.println("ID : " + studentId +"\n"+ "Name: " + name +"\n"+ "Age: " + age); System.out.println("Department: " + department + "\n"+"Email: " + email + "\n"+"Phone: " + phoneNumber); System.out.println("Address: " + address + "\n"+"Avg Marks: " + calculateAverage()); } }

class Main { // Main class to run the program static StudentProject[] students = new StudentProject[10]; // Max 10 students static int studentCount = 0; static Scanner sc = new Scanner(System.in);

public static void main(String[] args) { while (true) { System.out.println("\n1. Add Student "+"\n"+ "2. Add Marks "+"\n"+ "3. View Details"+"\n"+ "4. Exit"); System.out.print("Choose : "); int choice = sc.nextInt();

    switch (choice) {
        case 1 -> addStudent();
        case 2 -> addMarks();
        case 3 -> viewDetails();
        case 4 -> {
            System.out.println("Thank you for reaching out......");
            return;
        }
        default -> System.out.println("Invalid choice!");
    }
}

}

static void addStudent() { if (studentCount >= students.length) { System.out.println("Student limit reached!"); return; }

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();
sc.nextLine();
System.out.print("Enter Department: ");
String department = sc.nextLine();
System.out.print("Enter Email: ");
String email = sc.nextLine();
System.out.print("Enter Phone Number: ");
String phoneNumber = sc.nextLine();
System.out.print("Enter Address: ");
String address = sc.nextLine();

students[studentCount++] = new StudentProject(id, name, age, department, email, phoneNumber, address);
System.out.println("Student Added!");

}

static void addMarks() { System.out.print("Enter Student ID: "); int id = sc.nextInt(); StudentProject student = findStudent(id); if (student != null) { System.out.print("Enter Marks (-1 to stop): "); while (true) { int mark = sc.nextInt(); if (mark == -1) break; student.addMark(mark); } System.out.println("Marks Added!"); } else { System.out.println("Student Not Found!"); } }

static void viewDetails() { System.out.print("Enter Student ID: "); int id = sc.nextInt(); StudentProject student = findStudent(id); if (student != null) { student.displayDetails(); } else { System.out.println("Student Not Found!"); } }

static StudentProject findStudent(int id) { for (int i = 0; i < studentCount; i++) { if (students[i].studentId == id) { return students[i]; } } return null; }