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Java programming is widely used in software development due to its platform independence, robustness, and versatility. However, mastering Java requires diligent practice and a deep understanding of its concepts. Many students find themselves overwhelmed by the intricacies of Java programming assignments, leading to frustration and stress.

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Sample Java Assignment Questions and Solutions

To give you a glimpse of the kind of assistance we provide, here are two master-level Java assignment questions along with their solutions, completed by our expert:

Question 1: Implement a program to simulate a banking system using Java. The program should include classes for bank accounts, customers, and transactions. Ensure proper encapsulation and data validation.

Solution:

import java.util.ArrayList;

class Account {
    private int accountId;
    private double balance;

    public Account(int id, double initialBalance) {
        accountId = id;
        balance = initialBalance;
    }

    public int getAccountId() {
        return accountId;
    }

    public double getBalance() {
        return balance;
    }

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

    public void withdraw(double amount) {
        if (balance >= amount) {
            balance -= amount;
        } else {
            System.out.println("Insufficient funds!");
        }
    }
}

class Customer {
    private String name;
    private ArrayList<Account> accounts;

    public Customer(String n) {
        name = n;
        accounts = new ArrayList<>();
    }

    public void addAccount(Account acc) {
        accounts.add(acc);
    }

    public ArrayList<Account> getAccounts() {
        return accounts;
    }
}

public class BankingSystem {
    public static void main(String[] args) {
        Account acc1 = new Account(1, 1000);
        Account acc2 = new Account(2, 2000);

        Customer customer1 = new Customer("John");
        customer1.addAccount(acc1);
        customer1.addAccount(acc2);

        System.out.println("Customer: " + customer1.getName());
        System.out.println("Accounts:");
        for (Account acc : customer1.getAccounts()) {
            System.out.println("Account ID: " + acc.getAccountId() + ", Balance: " + acc.getBalance());
        }

        acc1.deposit(500);
        acc2.withdraw(1000);

        System.out.println("Updated balances:");
        for (Account acc : customer1.getAccounts()) {
            System.out.println("Account ID: " + acc.getAccountId() + ", Balance: " + acc.getBalance());
        }
    }
}

Question 2: Write a program to implement a binary search algorithm in Java.

Solution:

class BinarySearch {
    public static int search(int[] arr, int target) {
        int left = 0;
        int right = arr.length - 1;

        while (left <= right) {
            int mid = left + (right - left) / 2;

            if (arr[mid] == target)
                return mid;

            if (arr[mid] < target)
                left = mid + 1;
            else
                right = mid - 1;
        }

        return -1;
    }

    public static void main(String[] args) {
        int[] arr = {1, 3, 5, 7, 9, 11, 13, 15};
        int target = 9;
        int index = search(arr, target);
        if (index != -1)
            System.out.println("Element found at index: " + index);
        else
            System.out.println("Element not found");
    }
}
```

These solutions demonstrate the depth of knowledge and expertise our team possesses in Java programming. Whether you need assistance with basic concepts or advanced algorithms, we're here to help you succeed.

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