E-TOLL with JAVA

program ini mensimulasikan cara kerja mesin GTO pada gerbang tol
program akan mencek saldo kartu, bisa juga menambah saldo
jika saldo mencukupi maka gerbang tol akan terbuka

Account Class

	public class Account
	{
	private int accountNumber;
	private double availableBalance;
	public Account(int theAccountNumber,double theAvailableBalance)
	{
	accountNumber=theAccountNumber;
	availableBalance=theAvailableBalance;
	}
	public double getAvailableBalance()
	{
	return availableBalance;
	}
	public void getTotalBalance(double Amount)
	{
	availableBalance -= Amount;
	}
	public void getAddBalance(double Amount)
	{
	availableBalance += Amount;
	}
	public int getAccountNumber()
	{
	return accountNumber;
	}
	}

view raw accountclass.txt hosted with ❤ by GitHub

Screen Class

	import java.text.SimpleDateFormat;
	import java.util.Calendar;
	public class Screen
	{
	public void displayMessage(String message)
	{
	System.out.print(message);
	}
	public void displayMessageLine(String message)
	{
	System.out.println(message);
	}
	public void displayRPAmount(double amount)
	{
	System.out.printf("$%,.2f",amount);
	}
	public void displayCurrentTime() {
	Calendar cal = Calendar.getInstance();
	SimpleDateFormat sdf = new SimpleDateFormat("EEE , dd/MM/yyyy HH:mm:ss");
	System.out.println( sdf.format(cal.getTime()) );
	}
	}

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Database Class

	public class Database
	{
	private Account[] accounts; // array of Accounts
	// no-argument BankDatabase constructor initializes accounts
	public Database(){
	accounts = new Account[2]; // just 2 accounts for testing
	accounts[0] = new Account(12345, 12000.0);
	accounts[1] = new Account(56789, 2000.0);
	} // end no-argument BankDatabase constructor
	// retrieve Account object containing specified account number
	public Account getAccount(int accountNumber){
	// loop through accounts searching for matching account number
	for(Account currentAccount : accounts){
	// return current account if match found
	if(currentAccount.getAccountNumber() == accountNumber) return currentAccount;
	} // end for
	return null; // if no matching account was found, return null
	} // end method
	} // end class BankDatabase

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Tapscan Class

	import java.util.Scanner;
	public class TapScan
	{
	private Scanner input;
	public TapScan()
	{
	input=new Scanner(System.in);
	}
	public int getInput()
	{
	return input.nextInt();
	}
	}

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GTO Class

	public class GTO
	{
	private Account currentAccount;
	private TapScan TapScan;
	private Screen screen;
	private double Fare;
	private Database gtoDatabase;
	private double TopUp;
	public GTO()
	{
	currentAccount = null;
	TapScan = new TapScan();
	screen = new Screen();
	Fare = 10000;
	gtoDatabase = new Database();
	}
	public void run() {
	while (true)
	{
	displayGetAccount();
	if (currentAccount==null){
	screen.displayMessage("Account Invalid\n");
	continue;
	}
	screen.displayMessageLine("");
	displayAddBalance();
	if (currentAccount.getAvailableBalance() >= Fare)
	{
	currentAccount.getTotalBalance(Fare);
	printStruk();
	} else {
	screen.displayMessageLine("Saldo anda tidak mencukupi.\n");
	screen.displayMessage("\nSaldo anda: \n");
	screen.displayMessage("\n");
	screen.displayRPAmount(currentAccount.getAvailableBalance());
	}
	currentAccount = null;
	}
	}
	public void displayGetAccount()
	{
	screen.displayMessageLine("\n\nWelcome!");
	screen.displayMessage("\nToll Fare: ");
	screen.displayRPAmount(Fare);
	screen.displayMessageLine("\nInput Your Acc Number :");
	currentAccount = gtoDatabase.getAccount(TapScan.getInput());
	}
	public void displayAddBalance()
	{
	screen.displayMessage("\nSaldo anda: \n");
	screen.displayMessage("\n");
	screen.displayRPAmount(currentAccount.getAvailableBalance());
	screen.displayMessage("\nApakah anda ingin menambah saldo?");
	screen.displayMessage("\ntekan 0 untuk melewati");
	TopUp=TapScan.getInput();
	currentAccount.getAddBalance(TopUp);
	}
	public void printStruk()
	{
	screen.displayMessageLine("\nPT. Semen Padang");
	screen.displayCurrentTime();
	screen.displayMessage("\nBiaya Tol: ");
	screen.displayRPAmount(Fare);
	screen.displayMessage("\nSisa saldo: ");
	screen.displayRPAmount(currentAccount.getAvailableBalance());
	screen.displayMessageLine("\nTerima Kasih. Selamat menikmati perjalanan anda.\n");
	screen.displayMessage(" ");
	}
	}

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Main

	public class GTOMain
	{
	// main method creates and runs the ATM
	public static void main(String[] args){
	GTO gto = new GTO();
	gto.run();
	} // end main
	}

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output