Basic Banking Application

import java.util.Scanner;

public class BankingAppication {
	
	public static void main(String[] args) {
		
		BankAccount obj1 = new BankAccount("Shruti","880011");
		obj1.showMenu();
		
	}

}

class BankAccount{
	
	int balance;
	int previousTransaction;
	String customerName;
	String customerId;
	
	BankAccount(String cname, String cid){
		
		customerName = cname;
		customerId = cid;
		
	}
	
	void deposit(int amount) {
		
		if(amount != 0) {
			balance = balance + amount;
			previousTransaction = amount;
		}
	}
	
	void withdraw(int amount) {
		
		if(amount != 0) {
			balance = balance - amount;
			previousTransaction = -amount;
		}
	}
	
	void getPreviousTransaction() {
		
		if(previousTransaction > 0) {
			
			System.out.println("Deposited: " + previousTransaction);
			
		} else if(previousTransaction < 0) {
			
			System.out.println("Withdrawn: "+ previousTransaction);
		
		} else {
			
			System.out.println("No transaction occured");
			
		}
	}
	
	void showMenu() {
		
		char option = '\0';
		Scanner scanner = new Scanner(System.in);
		
		System.out.println("Welcome: " + customerName);
		System.out.println("Your ID is: " + customerId);
		System.out.println("/n");
		System.out.println("A. ChechBalance");
		System.out.println("B. Deposit");
		System.out.println("C. Withdraw");
		System.out.println("D. Previous Transaction");
		System.out.println("E. Exit");
	}
	
	do{
		System.out.println("*****************************************************************************************************************************");
		System.out.println("Enter an option");
		System.out.println("*****************************************************************************************************************************");
		Scanner scanner;
		char option = scanner.next().charAt(0);
		System.out.println("\n");
		
		switch(option) {
		
		case 'A':
			System.out.println("------------------------------------------------------------");
			System.out.println("Balance = "+balance);
			System.out.println("------------------------------------------------------------");
			System.out.println("\n");
			break;
			
		case 'B':
			System.out.println("------------------------------------------------------------");
			System.out.println("Enter an amount to deposit : ");
			System.out.println("------------------------------------------------------------");
			int amount = scanner.nextInt();
			deposit(amount);
			System.out.println("\n");
			break;
			
		case 'C':
			System.out.println("------------------------------------------------------------");
			System.out.println("Enter an amount to deposit : ");
			System.out.println("------------------------------------------------------------");
			int amount2 = scanner.nextInt();
			withdraw(amount2);
			System.out.println("\n");
			break;
			
		case 'D':
			System.out.println("------------------------------------------------------------");
			getPreviousTransaction();
			System.out.println("------------------------------------------------------------");
			System.out.println("\n");
			break;
			
			default: 
				System.out.println("Invalid Option!! Please enter again");
				break;
		} while(option != 'E');
		System.out.println("ThankYou for using our services");

	}
	
}