[javaseek]

Hi, guys I done my first java program...I am so happy

Code:

public class Pizza
{   
   private int totalAmount = 0;     //total sales amount per day
   private int totalQuantity = 0;     //total ordered pies quantity per day
   private int totalOrder = 0;     //total number of order per day
   final int price = 4;   //pizza pies price $4.
   
   public static void main(String[] args)
   {
     new Pizza();
   }
   /**
   * Constructor for objects of class Pizza
   */
   public Pizza()
   {
     // get the input data   
       
     welcome();  //print welcome and instruction message       
        
     int quantity = 1;
     
     while(quantity != -1)
     {  
         switch(quantity)
        {            
            case 0:
                output("0 pies ordered");
                quantity = 1;
                break;
            case 1:                          
            case 2:               
            case 3:               
            case 4:
                quantity = inputInt("Enter number of pies: "); 
                if((quantity > 4) || (quantity == 0) || (quantity < 0))break;
                int customerPrice = (quantity * this.price); //customer price calculation 
                output("Total price : $"+customerPrice+".00"); 
                this.totalQuantity += quantity;
                this.totalAmount += customerPrice;
                this.totalOrder += 1;
                break;
             default:                
                output("Error: You entered an invalid number of pies");              
                quantity = 1;              
                break;
             
        }//end switch
        
     }//end while 
     
     SummaryRun(); //call method summaryRun
     
   }//end Pizza
   
   public void SummaryRun()
   {
       String msg ="\n\nToday's sales summary report\n";      
       msg += "===============================================\n";
       msg += "Total number of order: "+this.totalOrder+"\n";
       msg += "Total number of ordered pizza pies : "+this.totalQuantity+"\n";
       msg += "Total amount of sales : $"+this.totalAmount+".00\n";
       msg += "Good bye\n";
       msg += "===============================================\n";       
              
       System.out.print(msg);
      
   }//end SummaryRun method  

   static void output(String info) { System.out.println(info); }
  
   public void welcome(){
       
       String msg ="Welcome to Pizza pies order program\n";      
       msg += "===============================================\n";
       msg += "The valid range number of pies is 1 to 4\n";
       msg += "The price is $"+this.price+".00 dollars per pies\n";
       msg += "To close this program, you need to enter -1\n";     
       msg += "===============================================\n";       
              
       System.out.print(msg);
   }//end welcome message
   
   static int inputInt(String Prompt)
   {
     int result=0;
     try{result=Integer.parseInt(input(Prompt).trim());}
     catch (Exception e){result = -2;}
     return result;
   }
   
   //handle Input type
   static String input(String prompt)
   {
     String inputLine = "";
     System.out.print(prompt);
     try
     {
       java.io.InputStreamReader sys = new java.io.InputStreamReader(System.in);
       java.io.BufferedReader inBuffer = new java.io.BufferedReader(sys);
       inputLine = inBuffer.readLine();
     }
     catch (Exception e)
     {
       String err = e.toString();
       System.out.println(err);
     }
     return inputLine;
     
   }//end input method 

}//end Pizza class

My program is running in command line based. There is one thing is left, I need to do. I was wondering if there any built-in method in java that can round the double number to two decimal places. I need it for the pies price. I want to change the price data type to double.