Notes

programme 1

import java.util.Scanner;



public class Table {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.print("Name: Manish SinghnUID: 21BCS5294n");

int[] empIds = {1001, 1002, 1003, 1004, 1005, 10006, 1007};

String[] empNames = {"Manish", "Harshit", "Abhay", "David", "Raj", "Hardik", "Rohit"};

String[] date = {"01/04/2009", "23/08/2012", "12/11/2008", "29/01/2013", "16/07/2005",

"01/01/2000", "12/06/2006"};

String[] designations = {"e", "c", "k", "r", "m", "e", "c"};

String[] dept = {"R & D", "PM", "Acct", "Front Desk", "Engg", "Manufacturar", "PM"};

int[] Basic = {20000, 30000, 10000, 12000, 50000, 23000, 29000};

int[] HRA = {8000, 12000, 8000, 6000, 20000, 9000, 12000};

int[] IT = {3000, 9000, 1000, 2000, 20000, 4400, 10000};

System.out.print("Enter Employee ID: ");

int find = sc.nextInt();

int index = -1;

for (int i = 0; i < empIds.length; i++) {

if (empIds[i] == find) {

index = i;

break;

}

}

if (index != -1) {

int salary = Basic[index] + HRA[index] - IT[index];

switch (designations[index]) {

case "e":

salary += 20000;

designations[index] = "Engineer";

break;

case "c":

salary += 32000;

designations[index] = "Consultant";

break;

case "k":

salary += 12000;

designations[index] = "Clerk";

break;

case "r":

salary += 15000;

designations[index] = "Receptionist";

break;

case "m":

salary += 40000;

designations[index] = "Manager";

break;

default:

break;

}

System.out.println("Emp No. | Emp Name | Department | Designation | Salary");

System.out.println(empIds[index] + " " + empNames[index] + " " + dept[index] + " " + designations[index] +

" " + salary);

} else {

System.out.println("Employee ID not found!");

}

}

}

Programe 2

import java.util.*;



class Video {

private String title;

private boolean checkedOut;

private int rating;



public Video(String title) {

this.title = title;

checkedOut = false;

rating = 0;

}



public String getTitle() {

return title;

}



public boolean isCheckedOut() {

return checkedOut;

}



public void setCheckedOut(boolean checkedOut) {

this.checkedOut = checkedOut;

}



public int getRating() {

return rating;

}



public void addRating(int rating) {

this.rating += rating;

}

}



class VideoStore {

private ArrayList<Video> inventory;



public VideoStore() {

inventory = new ArrayList<>();

}



public void addVideo(String title) {

inventory.add(new Video(title));

System.out.println("Video added successfully: " + title);

}



public void checkOutVideo(String title) {

for (Video video : inventory) {

if (video.getTitle().equalsIgnoreCase(title) && !video.isCheckedOut()) {

video.setCheckedOut(true);

System.out.println("Video checked out successfully: " + title);

return;

}

}

System.out.println("Video not available or already checked out: " + title);

}



public void returnVideo(String title) {

for (Video video : inventory) {

if (video.getTitle().equalsIgnoreCase(title) && video.isCheckedOut()) {

video.setCheckedOut(false);

System.out.println("Video returned successfully: " + title);

return;

}

}

System.out.println("Video not found or not checked out: " + title);

}



public void receiveRating(String title, int rating) {

for (Video video : inventory) {

if (video.getTitle().equalsIgnoreCase(title)) {

video.addRating(rating);

System.out.println("Rating added successfully for " + title + ": " + rating);

return;

}

}

System.out.println("Video not found: " + title);

}



public void listInventory() {

System.out.println("Video Inventory:");

for (Video video : inventory) {

System.out.println("Title: " + video.getTitle() + " | Checked Out: " + video.isCheckedOut() +

" | Rating: " + (video.getRating() == 0 ? "N/A" : video.getRating()));

}

}

}



public class Item {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

VideoStore videoStore = new VideoStore();

int choice;

do {

System.out.println("nMenu:");

System.out.println("1. Add Videos");

System.out.println("2. Check Out Videos");

System.out.println("3. Return Videos");

System.out.println("4. Receive Rating");

System.out.println("5. List Inventory");

System.out.println("6. Exit");

System.out.print("Enter your choice: ");

choice = scanner.nextInt();

scanner.nextLine(); // consume newline

switch (choice) {

case 1:

System.out.print("Enter video title to add: ");

String addTitle = scanner.nextLine();

videoStore.addVideo(addTitle);

break;

case 2:

System.out.print("Enter video title to check out: ");

String checkoutTitle = scanner.nextLine();

videoStore.checkOutVideo(checkoutTitle);

break;

case 3:

System.out.print("Enter video title to return: ");

String returnTitle = scanner.nextLine();

videoStore.returnVideo(returnTitle);

break;

case 4:

System.out.print("Enter video title to receive rating: ");

String ratingTitle = scanner.nextLine();

System.out.print("Enter rating out of 10: ");

int rating = scanner.nextInt();

if (rating <= 10 && rating >= 0) {

videoStore.receiveRating(ratingTitle, rating);

} else {

System.out.println("The Rating is incorrect..");

}

break;

case 5:

videoStore.listInventory();

break;

case 6:

System.out.println("Exiting...");

break;

default:

System.out.println("Invalid choice. Please enter a number between 1 and 6.");

}

} while (choice != 6);

scanner.close();

}

}

Programe 3



import java.util.Scanner;



class InvalidAgeException extends Exception {}

class InvalidAmountException extends Exception {}

class InvalidDaysException extends Exception {}

class InvalidMonthsException extends Exception {}



abstract class Account {

double interestRate;

double amount;

abstract double calculateInterest(double amount) throws InvalidMonthsException, InvalidAgeException, InvalidAmountException, InvalidDaysException;

}



class FDaccount extends Account {

double FDinterestRate;

double FDAmount;

int noOfDays;

int ageOfACHolder;

double General, SCitizen;

Scanner FDScanner = new Scanner(System.in);



double calculateInterest(double amount) throws InvalidAgeException, InvalidAmountException, InvalidDaysException {

this.FDAmount = amount;

System.out.println("Enter FD days");

noOfDays = FDScanner.nextInt();

System.out.println("Enter FD age holder ");

ageOfACHolder = FDScanner.nextInt();



if (amount < 0) {

throw new InvalidAmountException();

}

if (noOfDays < 0) {

throw new InvalidDaysException();

}

if (ageOfACHolder < 0) {

throw new InvalidAgeException();

}



// Rest of the code...

return FDAmount * FDinterestRate;

}

}



class RDaccount extends Account {

// Similar to FDaccount...

}



class SBaccount extends Account {

// Similar to FDaccount...

}



public class InterestCalculator {

public static void main(String[] args) {

boolean val = true;

Scanner sc = new Scanner(System.in);

System.out.println("Name: Manish SinghnUID: 21BCS5294");



while (val) {

System.out.println("SELECT THE OPTIONS " + "n1." + " Interest Calculator- SB" + " n2." + " Interest Calculator-FD" + "n3." + " Interest Calculator-RD" + "n4." + " Exit");

System.out.print("Enter your choice : ");

int choice = sc.nextInt();

switch (choice) {

case 1:

// SBaccount calculation...

break;

case 2:

// FDaccount calculation...

break;

case 3:

// RDaccount calculation...

break;

case 4:

val = false;

System.out.println("Exiting the program.");

break;

default:

System.out.println("Wrong choice");

break;

}

}

sc.close(); // Close the scanner

}

}



programe 4



import java.util.*;



class Card {

String symbol;

int number;



public Card(String symbol, int number) {

this.symbol = symbol;

this.number = number;

}



public String getSymbol() {

return symbol;

}



public int getNumber() {

return number;

}



@Override

public String toString() {

return symbol + " " + number;

}

}



public class Cards {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.println("Name: Manish SinghnUID: 21BCS5294");

System.out.print("Enter Number of Cards:");

int n = scanner.nextInt();

scanner.nextLine();



if (n <= 0) {

System.out.println("Invalid input for the number of cards.");

return;

}



Map<String, List<Card>> mp = new TreeMap<>();



for (int i = 1; i <= n; i++) {

System.out.println("Enter card " + i + ":");

String symbol = scanner.nextLine();

int number = scanner.nextInt();

scanner.nextLine();

Card card = new Card(symbol, number);

mp.computeIfAbsent(symbol, k -> new ArrayList<>()).add(card);

}



System.out.println("Distinct Symbols are:");

for (String symbol : mp.keySet()) {

System.out.print(symbol + " ");

}

System.out.println();



for (Map.Entry<String, List<Card>> entry : mp.entrySet()) {

System.out.println("Cards in " + entry.getKey() + " Symbol");

int sum = 0;

for (Card card : entry.getValue()) {

System.out.println(card);

sum += card.getNumber();

}

System.out.println("Number of cards: " + entry.getValue().size());

System.out.println("Sum of Numbers: " + sum);

}



scanner.close(); // Closing the scanner

}

}



Programme 5



import java.util.*;



class Card {

private String symbol;

private int number;



public Card(String symbol, int number) {

this.symbol = symbol;

this.number = number;

}



public String getSymbol() {

return symbol;

}



@Override

public String toString() {

return symbol + " " + number;

}



@Override

public boolean equals(Object o) {

if (this == o) return true;

if (!(o instanceof Card)) return false;

Card card = (Card) o;

return number == card.number &&

Objects.equals(symbol, card.symbol);

}



@Override

public int hashCode() {

return Objects.hash(symbol, number);

}

}



public class cards2 {

public static void main(String[] args) {

TreeSet<Card> cards = new TreeSet<>(Comparator.comparing(Card::getSymbol));

Scanner scanner = new Scanner(System.in);

System.out.println("Name: Manish SinghnUID: 21BCS5294");

System.out.print("Enter a number of cards: ");

int n = scanner.nextInt();

int i = n;

for (int j = 0; j < n; j++) {

System.out.print("Enter a card symbol: ");

String symbol = scanner.next();

System.out.print("Enter a card number: ");

int number = scanner.nextInt();

if (cards.size() < 4) {

Card card = new Card(symbol, number);

if (!cards.stream().anyMatch(c -> c.getSymbol().equals(symbol))) {

cards.add(card);

} else {

System.out.println("Symbol already exists, try another.");

j--; // Decrement j to re-prompt for the same index

}

}

}

System.out.println("Four symbols gathered in " + i + " cards.");

System.out.println("Cards in Set are :");

for (Card card : cards) {

System.out.println(card);

}

}

}



programme6

import java.util.ArrayList;

import java.util.Scanner;



public class stringlist {

public static void main(String[] args) {

ArrayList<String> itemList = new ArrayList<>();

Scanner scanner = new Scanner(System.in);

int choice;

do {

System.out.println("1. Insert");

System.out.println("2. Search");

System.out.println("3. Delete");

System.out.println("4. Display");

System.out.println("5. Exit");

System.out.print("Enter your choice: ");

choice = scanner.nextInt();

scanner.nextLine(); // Consume newline

switch (choice) {

case 1:

System.out.print("Enter the item to be inserted: ");

String item = scanner.nextLine();

itemList.add(item);

System.out.println("Inserted successfully");

break;

case 2:

System.out.print("Enter the item to search: ");

String searchItem = scanner.nextLine();

if (itemList.contains(searchItem)) {

System.out.println("Item found in the list.");

} else {

System.out.println("Item not found in the list.");

}

break;

case 3:

System.out.print("Enter the item to delete: ");

String deleteItem = scanner.nextLine();

if (itemList.remove(deleteItem)) {

System.out.println("Deleted successfully");

} else {

System.out.println("Item does not exist.");

}

break;

case 4:

System.out.println("The Items in the list are:");

for (String itemInList : itemList) {

System.out.print(itemInList + " ");

}

System.out.println();

break;

case 5:

System.out.println("Exiting...");

break;

default:

System.out.println("Invalid choice. Please enter a valid option.");

}

} while (choice != 5);

scanner.close();

}

}



programme 7



import java.io.*;

import java.util.*;



class Employee {

private int id;

private String name;

private int age;

private double salary;



public Employee(int id, String name, int age, double salary) {

this.id = id;

this.name = name;

this.age = age;

this.salary = salary;

}



public String toString() {

return id + " " + name + " " + age + " " + salary;

}

}



public class filedata {

private static final String FILE_NAME = "file.txt";

private static List<Employee> employees = new ArrayList<>();



public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

int choice;

do {

System.out.println("Main Menu");

System.out.println("1. Add an Employee");

System.out.println("2. Display All");

System.out.println("3. Exit");

System.out.print("Enter your choice: ");

choice = scanner.nextInt();

scanner.nextLine();

switch (choice) {

case 1:

addEmployee(scanner);

break;

case 2:

displayAllEmployees();

break;

case 3:

System.out.println("Exiting the System");

break;

default:

System.out.println("Invalid choice. Please enter a number between 1 and 3.");

}

} while (choice != 3);

scanner.close();

}



private static void addEmployee(Scanner scanner) {

System.out.print("Enter Employee ID: ");

int id = scanner.nextInt();

scanner.nextLine();

System.out.print("Enter Employee Name: ");

String name = scanner.nextLine();

System.out.print("Enter Employee Age: ");

int age = scanner.nextInt();

scanner.nextLine();

System.out.print("Enter Employee Salary: ");

double salary = scanner.nextDouble();

scanner.nextLine();

Employee employee = new Employee(id, name, age, salary);

employees.add(employee);

try (PrintWriter writer = new PrintWriter(new FileWriter(FILE_NAME, true))) {

writer.println(employee);

} catch (IOException e) {

System.out.println("Error writing to file: " + e.getMessage());

}

}



private static void displayAllEmployees() {

System.out.println("--------------------------------------------");

for (Employee employee : employees) {

System.out.println(employee);

}

System.out.println("--------------------------------------------");

}

}