Banking Application in Java

In this section, we will learn how to create a mini-application for a banking system in Java. In this program, we will add some basic functionalities of a bank account like a deposit of amount, withdrawal of amount, etc.

Initially, the program accepts the number of customers we need to add and adds the customer and account details accordingly. Further, it displays the series of menus to operate over the accounts.

The series of menus displayed are as follows:

Display all account details
Search by account number
Deposit the amount
Withdraw the amount
Exit

Java Program for Banking Application System

BankingApp.java

import java.util.Scanner;
class BankDetails {
    private String accno;
    private String name;
    private String acc_type;
    private long balance;
    Scanner sc = new Scanner(System.in);
    //method to open new account
    public void openAccount() {
        System.out.print("Enter Account No: ");
        accno = sc.next();
        System.out.print("Enter Account type: ");
        acc_type = sc.next();
        System.out.print("Enter Name: ");
        name = sc.next();
        System.out.print("Enter Balance: ");
        balance = sc.nextLong();
    }
    //method to display account details
    public void showAccount() {
        System.out.println("Name of account holder: " + name);
        System.out.println("Account no.: " + accno);
        System.out.println("Account type: " + acc_type);
        System.out.println("Balance: " + balance);
    }
    //method to deposit money
    public void deposit() {
        long amt;
        System.out.println("Enter the amount you want to deposit: ");
        amt = sc.nextLong();
        balance = balance + amt;
    }
    //method to withdraw money
    public void withdrawal() {
        long amt;
        System.out.println("Enter the amount you want to withdraw: ");
        amt = sc.nextLong();
        if (balance >= amt) {
            balance = balance - amt;
            System.out.println("Balance after withdrawal: " + balance);
        } else {
            System.out.println("Your balance is less than " + amt + "\tTransaction failed...!!" );
        }
    }
    //method to search an account number
    public boolean search(String ac_no) {
        if (accno.equals(ac_no)) {
            showAccount();
            return (true);
        }
        return (false);
    }
}
public class BankingApp {
    public static void main(String arg[]) {
        Scanner sc = new Scanner(System.in);
        //create initial accounts
        System.out.print("How many number of customers do you want to input? ");
        int n = sc.nextInt();
        BankDetails C[] = new BankDetails[n];
        for (int i = 0; i < C.length; i++) {
            C[i] = new BankDetails();
            C[i].openAccount();
        }
        // loop runs until number 5 is not pressed to exit
        int ch;
        do {
            System.out.println("\n ***Banking System Application***");
            System.out.println("1. Display all account details \n 2. Search by Account number\n 3. Deposit the amount \n 4. Withdraw the amount \n 5.Exit ");
            System.out.println("Enter your choice: ");
            ch = sc.nextInt();
                switch (ch) {
                    case 1:
                        for (int i = 0; i < C.length; i++) {
                            C[i].showAccount();
                        }
                        break;
                    case 2:
                        System.out.print("Enter account no. you want to search: ");
                        String ac_no = sc.next();
                        boolean found = false;
                        for (int i = 0; i < C.length; i++) {
                            found = C[i].search(ac_no);
                            if (found) {
                                break;
                            }
                        }
                        if (!found) {
                            System.out.println("Search failed! Account doesn't exist..!!");
                        }
                        break;
                    case 3:
                        System.out.print("Enter Account no. : ");
                        ac_no = sc.next();
                        found = false;
                        for (int i = 0; i < C.length; i++) {
                            found = C[i].search(ac_no);
                            if (found) {
                                C[i].deposit();
                                break;
                            }
                        }
                        if (!found) {
                            System.out.println("Search failed! Account doesn't exist..!!");
                        }
                        break;
                    case 4:
                        System.out.print("Enter Account No : ");
                        ac_no = sc.next();
                        found = false;
                        for (int i = 0; i < C.length; i++) {
                            found = C[i].search(ac_no);
                            if (found) {
                                C[i].withdrawal();
                                break;
                            }
                        }
                        if (!found) {
                            System.out.println("Search failed! Account doesn't exist..!!");
                        }
                        break;
                    case 5:
                        System.out.println("See you soon...");
                        break;
                }
            }
            while (ch != 5);
        }
    }

Output 1: