Bank.java

package Bank.com;
import java.util.*;

public class BankApplication {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		System.out.print("Enter Customer Name: ");
		String name = sc.nextLine();

		System.out.print("Enter Customer ID: ");
		String id = sc.nextLine();

		BankAccount bank = new BankAccount(name, id);
		bank.showActivites();

		sc.close();
	}
}

class BankAccount {
	int balance;
	int previousTransaction;
	String customerName;
	String customerId;

	public BankAccount(String customerName, String customerId) {
		this.customerName = customerName;
		this.customerId = customerId;
	}

	public void deposit(int amount) {
		if (amount != 0) {
			balance = balance + amount;
			previousTransaction = amount;
		}
	}

	public void withdraw(int amount) {
		if (amount != 0) {
			balance = balance - amount;
			previousTransaction = -amount;
		}
	}

	public void getpreviousTransaction() {
		if (previousTransaction < 0) {
			System.out.println("Withdrawn: " + Math.abs(previousTransaction));
		} else if (previousTransaction > 0) {
			System.out.println("Deposited: " + previousTransaction);
		} else {
			System.out.println("No transaction has been done.");
		}
	}

	public void showActivites() {
		char option = '\0';
		Scanner sc = new Scanner(System.in);

		System.out.println("Welcome: " + customerName);
		System.out.println("Your ID: " + customerId);
		System.out.println();
		System.out.println("A. Show Balance");
		System.out.println("B. Deposit");
		System.out.println("C. Withdraw");
		System.out.println("D. Previous Transaction");
		System.out.println("E. Exit");

		do {
			System.out.print("\nEnter an options given above: ");
			option = sc.next().charAt(0);
			option = Character.toUpperCase(option);

			switch (option) {
				case 'A':
					System.out.println("Balance is: " + balance);
					break;
				case 'B':
					System.out.print("Enter the amount to deposit: ");
					int amount = sc.nextInt();
					deposit(amount);
					break;
				case 'C':
					System.out.print("Enter the amount to withdraw: ");
					int amount2 = sc.nextInt();
					withdraw(amount2);
					break;
				case 'D':
					getpreviousTransaction();
					break;
				case 'E':
					System.out.println("Exiting... Thank you for banking with us!");
					break;
				default:
					System.out.println("Invalid option. Please try again.");
					break;
			}
		} while (option != 'E');

		sc.close();
	}
}