SET => 1

class TicketBookingSystem { private int availableTickets;

public TicketBookingSystem(int availableTickets) {
    this.availableTickets = availableTickets;
}

public synchronized void bookTickets(int requestedTickets, String customerName) {
    if (requestedTickets <= availableTickets) {
        System.out.println(customerName + " booked " + requestedTickets + " tickets.");
        availableTickets -= requestedTickets;
    } else {
        System.out.println("Insufficient tickets. " + customerName + " could not book tickets.");
    }
}

}

class Customer implements Runnable { private String name; private int requestedTickets; private TicketBookingSystem bookingSystem;

public Customer(String name, int requestedTickets, TicketBookingSystem bookingSystem) {
    this.name = name;
    this.requestedTickets = requestedTickets;
    this.bookingSystem = bookingSystem;
}

public void run() {
    bookingSystem.bookTickets(requestedTickets, name);
}

}

public class Main { public static void main(String[] args) { TicketBookingSystem bookingSystem = new TicketBookingSystem(10);

    // Create three customer threads
    Customer customer1 = new Customer("Customer 1", 4, bookingSystem);
    Customer customer2 = new Customer("Customer 2", 3, bookingSystem);
    Customer customer3 = new Customer("Customer 3", 5, bookingSystem);

    Thread thread1 = new Thread(customer1);
    Thread thread2 = new Thread(customer2);
    Thread thread3 = new Thread(customer3);

    // Start all customer threads
    thread1.start();
    thread2.start();
    thread3.start();
}

}

SET 2 =>

class BankAccount { private double balance;

public BankAccount(double initialBalance) {
    this.balance = initialBalance;
}

public synchronized void deposit(double amount) {
    balance += amount;
}

public synchronized double inquire() {
    return balance;
}

}

class Customer implements Runnable { private String name; private double amount; private BankAccount account;

public Customer(String name, double amount, BankAccount account) {
    this.name = name;
    this.amount = amount;
    this.account = account;
}

public void run() {
    account.deposit(amount);
    System.out.println(name + " deposited $" + amount);
    System.out.println(name + "'s balance: $" + account.inquire());
}

}

public class Main { public static void main(String[] args) { BankAccount account = new BankAccount(1000);

    // Create three customer threads
    Customer customer1 = new Customer("Customer 1", 500, account);
    Customer customer2 = new Customer("Customer 2", 300, account);
    Customer customer3 = new Customer("Customer 3", 200, account);

    Thread thread1 = new Thread(customer1);
    Thread thread2 = new Thread(customer2);
    Thread thread3 = new Thread(customer3);

    // Start all customer threads
    thread1.start();
    thread2.start();
    thread3.start();
}

}