Final Project 2nd Attempt (Total change)

// What the system lacks atm:
> how to let it run from the top if the user opts to "shop more"
> how to add up all of the user's purchased items
> More items...

package HomePrac;
import java.io.FileNotFoundException;
import javax.swing.JOptionPane;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.*;

public class FilePrinter {

    public static void main(String[] args) throws FileNotFoundException {

    	PrintWriter bill = new PrintWriter ("bill.txt");

       String a = "Monitor" ,b = "Processor",  c = "RAM";
       String a1 = "LG", b1 = "Asus", c1 = "Acer";

       String item = JOptionPane.showInputDialog("Please enter what item you are looking for");


       if (item.equalsIgnoreCase(a))
    		   {
    	   JOptionPane.showMessageDialog(null, "You have chosen " +a+ "s");
    	   String monitorbrand = JOptionPane.showInputDialog("Please enter the brand you want. These are our current available ones:" + "\n" + a1 + "\n" + b1 + "\n" + c1);



    	   	if (monitorbrand.equalsIgnoreCase(a1))
    	   			{
    	   			double lgprice = 8000;
    	   		JOptionPane.showMessageDialog(null, "You have chosen " + a1 + ". the price for this is " + lgprice );
    	   			int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));

    	   		double total = lgprice*qty;
    	   		bill.println(total); // Prints the value of selected String to the txt file, so it could be calculated and outputed later on for checkout
    	   		bill.close();

    	   		JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +a1+ ". Your total will now be " + total);

    	   		// Need to add confirm on this part = "Shop more? Select 'No' to proceed to checkout"

    	   			}

    	   	else if (monitorbrand.equalsIgnoreCase(b1))
    	   	{
    	   			double Asusprice = 9500;
    	   		JOptionPane.showMessageDialog(null, "You have chosen " + b1 + ". the price for this is " + Asusprice );
    	   			int qty = Integer.parseInt (JOptionPane.showInputDialog("Please enter quantity"));

    	   		double total = Asusprice*qty;
    	   		bill.println(Asusprice*qty);
    			bill.close();

    			JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " + b1 + ". Your total will now be " + total);
    	   	}



    	   		Scanner infile = new Scanner (new FileReader("bill.txt"));

    	   		double flgprice;
    	   		flgprice = infile.nextDouble();

    	   		JOptionPane.showMessageDialog(null, "Your total is " + flgprice);


    	   			}
       }


           }