ATM.java

import java.util.Scanner;
class Registration {
	import java.util.Scanner;

	class Registration {
	    private String Userpin;
	    private String UserID;
	    private String User_Name;
	    private String Acc_num;
	    private String pwd;

	    public boolean register() {
	        Scanner sc = new Scanner(System.in);
	        boolean successReg = false;
	        System.out.println("Enter the UserName (Minimum length of 8 characters please enter)");
	        this.User_Name = sc.next();
	        System.out.println("Enter the UserID");
	        this.UserID = sc.next();
	        System.out.println("Enter the 4 digits of UserPin");
	        this.Userpin = sc.next();
	        System.out.println("Enter your 10 digits of your Account Number");
	        this.Acc_num = sc.next();
	        System.out.println("Enter the Password");
	        this.pwd = sc.next();
	        if (Acc_num.length() == 10 && Userpin.length() == 4 && User_Name.length() >= 8) {
	            successReg = true;
	        } else {
	            successReg = false;
	        }
	        return successReg;
	    }

	    public String getUserName() {
	        return User_Name;
	    }

	    public String getUserID() {
	        return UserID;
	    }

	    public String getUserpin() {
	        return Userpin;
	    }

	    public String getAccNum() {
	        return Acc_num;
	    }

	    public String getPassword() {
	        return pwd;
	    }
	}

}
class Login 
{
	    private String UserID;
	    private String Userpin;
	    private String User_Name;

	    public boolean login(String UserID, String Userpin, String User_Name) {
	        Scanner sc = new Scanner(System.in);
	        boolean loginSuccess = false;
	        System.out.println("Enter the UserID");
	        String inputUserID = sc.next();
	        if (inputUserID.equals(UserID)) {
	            System.out.println("Enter the UserPin");
	            String inputUserpin = sc.next();
	            if (inputUserpin.equals(Userpin)) {
	                System.out.println("You have successfully Login to your account " + User_Name);
	                loginSuccess = true;
	            } else {
	                System.out.println("Your Userpin is correctly enter.Please check your Userpin");
	            }
	        } else {
	            System.out.println("UserID is not exists. Please check once your UserID");
	        }
	        return loginSuccess;
	    }
	}

}

class BankAccount {
	    private String Acc_num;
	    private int balance = 0;
	    private int transactions = 0;
	    private String Transaction_History = "";

	    public BankAccount(String Acc_num) {
	        this.Acc_num = Acc_num;
	    }

	    public void accDeposit() {
	        Scanner sc = new Scanner(System.in);
	        System.out.println("Enter amount to be deposited in your bank account");
	        int deposit_cash = sc.nextInt();
	        balance = balance + deposit_cash;
	        transactions++;
	        String actions = "In Account number:" + Acc_num + "\n" + deposit_cash + " Deposited in Account ";
	        Transaction_History += actions;
	        System.out.println("In your account Rs." + deposit_cash + " is deposited");
	    }

	    public void accTransfer() {
	        System.out.println("Enter transfer account number of 10 digits from your account");
	        Scanner sc = new Scanner(System.in);
	        String trans_acc = sc.next();
	        System.out.println("Enter amount to transfer");
	        int trans_amount = sc.nextInt();
	        if (trans_acc.length() == 10 && trans_amount <= balance) {
	            System.out.println("You entered transfer account number is correct.");
	            System.out.println("Rs." + trans_amount + " is transferred account number as " + trans_acc + " from your account");
	            balance -= trans_amount;
	            transactions++;
	            String str = "\nRs." + trans_amount + " is transferred from your bank account to " + trans_acc;
	            Transaction_History += str;

	        } else if (trans_acc.length() != 10) {
	            System.out.println("You entered Wrong account number. Please check it once.");
	        } else {
	            System.out.println("You have insufficient balance in your account. Please check balance");
	        }

	    }

	    public void transHistory() {
	        if (transactions == 0)
	            System.out.println("There is no transactions occurred in your bank account");
	        else
	            System.out.println(Transaction_History);
	    }

	    public void checkBalance() {
	        System.out.println("Rs." + balance + " is your bank balance");
	    }

	    public void accWithdraw() {
	        System.out.println("Enter amount to withdraw from your account");
	        Scanner sc = new Scanner(System.in);
	        int withdraw_amount = sc.nextInt();
	        if (balance < withdraw_amount) {
	            System.out.println("You have insufficient balance for withdrawing money for your request. Please check your balance.");
	        } else {
	            System.out.println("Rs." + withdraw_amount + " is withdrawing from your account");
	            String str = "\nRs." + withdraw_amount + " is withdrawing from your account";
	            transactions++;
	            Transaction_History += str;
	            balance -= withdraw_amount;
	        }
	    }
	}

}

public class ATM{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("\n*****WELCOME TO  ATM SYSTEM***\n");
        System.out.println("*** 1.Register *** \n*** 2.Exit ***");
        System.out.print("Enter Your Choice - ");
        int choice = sc.nextInt();

        if (choice == 1) {
            Registration registration = new Registration();
            if (registration.register()) {
                System.out.println("You have successfully registered for your new bank account");
            } else {
                System.out.println("You are giving wrong information please start registration process from starting");
                System.exit(0);
            }

            String userID = registration.getUserID();
            String userpin = registration.getUserpin();
            String userName = registration.getUserName();
            String accNum = registration.getAccNum();

            Login login = new Login();
            if (login.login(userID, userpin, userName)) {
                System.out.println("\n\n*****WELCOME BACK " + userName + " *****\n");

                BankAccount bankAccount = new BankAccount(accNum);

                while (true) {
                    System.out.println("\n1.Withdraw \n2.Deposit \n3.Transfer \n4.Check Balance \n5.Transaction History \n6.Exit");
                    System.out.print("\nEnter Your Choice - ");
                    int c = sc.nextInt();
                    switch (c) {
                        case 1:
                            bankAccount.accWithdraw();
                        break;
                        case 2:
                            bankAccount.accDeposit();
                            break;
                        case 3:
                            bankAccount.accTransfer();
                            break;
                        case 4:
                            bankAccount.checkBalance();
                            break;
                        case 5:
                            bankAccount.transHistory();
                            break;
                        default:
                            System.exit(0);
                    }
                }
            } else {
                System.exit(0);
            }
        } else {
            System.exit(0);
        }
    }
}