ATM hacking (hack folder)

 

import java.util.Scanner;
	public class ATM {
	//----------- Constant -----------
	public static final int password = 1234;
	public static final int maxWithdraw = 20000;
	//----------- Method -----------
	public static void welcome() {
	}
	public static boolean checkPass(int pass) {
	return pass == password;
	}
	public static boolean checkLimit(int amount) {
	return amount <= maxWithdraw;
	}
	public static boolean check100(int amount) {
	return amount % 100 == 0;
	}
	public static void showBanknotes(int amount) {
	System.out.println("You need " + amount + " baht");
	int numberOfFiftyNotes = amount / 50;
	amount = amount % 50;
	int numberOfTwentyNotes = amount / 20;
	amount = amount % 20;
	int numberOfTenCoins = amount / 10;
	//amount = amount / 10;
	System.out.println();
	System.out.println("You get " + numberOfFiftyNotes + " fifty notes");
	System.out.println("You get " + numberOfTwentyNotes + " twenty notes");
	System.out.println("You get " + numberOfTenCoins + " ten coins");
	}
	public static void goodbye() {
	System.out.println("Good bye.");
	}
	public static void main(String[] args) {
	System.out.println("-------ATM--------");
	welcome();
	Scanner keyboard = new Scanner(System.in);
	System.out.print("Enter 4-digit password: ");
	int keypass = keyboard.nextInt();
	if (checkPass(keypass)) {
	System.out.print("Enter amount of withdraw: ");
	int withdraw = keyboard.nextInt();
	if (checkLimit(withdraw)) {
	if (check100(withdraw)) {
	showBanknotes(withdraw);
	} else {
	System.out.println("Sorry. Amount is not divisible by 100");
	}
	} else {
	System.out.println("Sorry. Under or over withdrawal limit");
	}
	} else {
	System.out.println("Sorry. Wrong password");
	}
	goodbye();
	}
	}