Studi Kasus : Mesin Tiket

Ticket Machine Case Study (Studi Kasus Mesin Tiket)

Ticket Machine adalah sebuah mesin seperti ATM, yang berfungsi melayani penjualan tiket kereta api dari satu tujuan ke tujuan yang lain. Di dalam Ticket Machine ada sebuah program atau perangkat lunak yang mengatur harga tiket di tiap tujuan, mengatur kembalian uang, dan juga mencetak receipt sebagai bukti pembelian tiket.

Berikut ini program TicketMachine dan program pengaplikasiannya (IntMain) :

Source code : Program TicketMachine

 /**  
  * Program Class Ticket Machine  
  * Untuk menyimpan saldo, harga tiket, dan jumlah uang yang dikumpulkan mesin   
  * Nama file : TicketMachine.java  
  */  
   
 public class TicketMachine  
 {  
   private int price;  //The price of a ticket from this machine  
   private int balance; //The amount of money entered by a customer so far  
   private int total;  //The total amount of money collected by this machine  
     
   public TicketMachine(int ticketCost)  
   {  
     price = ticketCost;  
     balance = 0;  
     total = 0;  
   }  
     
   public int getPrice()  
   {  
     return price;  
   }  
     
   public int getBalance()  
   {  
     return balance;  
   }  
     
   public void insertMoney(int amount)  
   {  
     balance = balance + amount;  
   }  
     
   /* Print a ticket */  
   public void printTicket()  
   {  
     System.out.println("##################");  
     System.out.println("# The BlueJ Line ");  
     System.out.println("# Ticket");  
     System.out.println("# " + price + " cents.");  
     System.out.println("##################");  
     System.out.println();  
       
     //Update the total collected with the balance  
     total = total + balance;  
       
     //clear the balance  
     balance = 0;  
   }  
 }  

Source Code : Program IntMain

 /**  
  * Program IntMain  
  * Program utama yang mengaplikasikan program ticket machine  
  * Nama file : IntMain.java  
  */  
   
 import java.util.Scanner;  
   
 public class IntMain  
 {  
   public static void main (String args[])  
   {  
     Scanner scan = new Scanner(System.in);  
     int cost, menu;  
     System.out.println("Masukkan harga tiket\n");  
     cost = scan.nextInt();  
     TicketMachine ticket = new TicketMachine(cost);  
     while (true)  
     {  
       System.out.println("1. Get Price");  
       System.out.println("2. Get Balance");  
       System.out.println("3. Insert Money");  
       System.out.println("4. Print Ticket");  
       System.out.print("Masukkan nomor : ");  
       menu = scan.nextInt();  
       switch(menu)  
       {  
         case 1:   
           cost = ticket.getPrice();  
           System.out.println(cost);  
           break;  
         
         case 2:  
           System.out.println(ticket.getBalance());  
           break;  
           
         case 3:  
           int money = scan.nextInt();  
           ticket.insertMoney(money);  
           break;  
           
         case 4:  
           ticket.printTicket();  
           break;  
       }  
     }  
   }  
 }  

Output :