Java: ATM Machine JavaCode program

This is an ATM java program code. This code works like that of the real ATM Machine and those looking for similar codes to build their own can simple look at the one below and implement theirs. But never forget to reference the source which is at NaijaHome Newz.

Below is the JavaCode for the ATM

import java.util.Scanner;
public class AtmMachine{
 private double accountBalance = 1000000.00;
 int pin;
 int number = 0000;
  Scanner input = new Scanner(System.in); 
 
 public AtmMachine(double theBalance){
  this.accountBalance = accountBalance;
 }
 public void newPin(int n){
  number = n;
 }
 public void thePins(int p){
  do{
   System.out.print("Welcome! Please Enter Your secret Number: ");
    pin = input.nextInt();
  }
  while (pin != number);
  System.out.println();
  theMenu(0);  
}
public void theMenu(int m){
 System.out.println("1. Withdraw \t 3. Enquiry \n 2. Transfer Fund \t 4. Change Pin");
 System.out.println();
 int q = input.nextInt();
 switch(q){
  case 1: theWithdraw(0); break;
  case 2: theTransfer(0); break;
  case 3: theEnquiry(0); break;
  case 4: theChange(0); break;
  default: {System.out.print("Invalid Input!");
  System.out.println();
  theMenu(0);
  }
 }
}
public void theWithdraw(double w){
 System.out.println("1. 500 \t 4. 5000 \n 2. 1000 \t 5. 20000 \n 3. 2000 \t 6. Others");
 int wi = input.nextInt();
 switch(wi){
  case 1: {
   accountBalance -= 500;
   System.out.println("Your New Account Balance After Withdrawal Is: " +accountBalance);
   theQuestion(0);
  } break;
  case 2: {
   accountBalance -= 1000;
   System.out.println("Your New Account Balance After Withdrawal Is: " +accountBalance);
   theQuestion(0);
  } break;
  case 3: {
   accountBalance -= 2000;
   System.out.println("Your New Account Balance After Withdrawal Is: " +accountBalance);
   theQuestion(0);
  } break;
  case 4:{
   accountBalance -= 5000;
   System.out.println("Your New Account Balance After Withdrawal Is: " +accountBalance);
   theQuestion(0);
  } break;
  case 5: {
   accountBalance -= 20000;
   System.out.println("Your New Account Balance After Withdrawal Is: " +accountBalance);
   theQuestion(0);
  } break;
  default:{
   System.out.print("Please Enter The Amount You Would Like To Withdraw: ");
   double am = input.nextDouble();
   accountBalance -= am;
   System.out.println("Your New Account Balance After Withdrawal Is: " +accountBalance);
   theQuestion(0);
  }
 }
}
public void theTransfer(int t){
 System.out.println("Sorry! Not available At The Moment. Please Try Again Later");
 System.out.println();
   theQuestion(0);
}
public void theEnquiry(int e){
 System.out.println("1.Savings \t 2. Currents");
 int sc = input.nextInt();
 switch(sc){
  case 1: {System.out.println("Your Savings Account Balance Is: " +accountBalance);
   theQuestion(0);
  } break;
  default: {System.out.println("Your Currents Account Balance Is: " +accountBalance);
   theQuestion(0);
  }
 }
}
public void theChange(int c){
 System.out.print("Please Enter Your New Pin Number: ");
 int newPin = input.nextInt();
 newPin(newPin);
 System.out.println("Your Pin Is Changed Successfully! \n Your New Pin Is now: "+newPin);
 System.out.println();
 theQuestion(0);
}
public void theQuestion(int q){
 System.out.println("Do You Want To Perform Another Transaction? \n 1. Yes \t 2. No");
 int qu = input.nextInt();
 switch(qu){
  case 1: thePins(0); break;
  case 2: System.out.println("Please take your card ");
  System.exit(0);
  default: System.out.println("Thank You For Banking With Us!");
 }
 System.out.println();
 
 thePins(0);
}
public static void main(String[]args){
  AtmMachine bag = new AtmMachine(1000000.0);
  bag.thePins(0);
 }
}

PS: The initial password to login is 0000
Note: Never forget to name your class as AtmMachine