FINISHED (FILEREADER/PRINTWRITER) student, class prog.

//PARTIALLY DONE CODE FOR FINAL PROJECT. JUST NEED TO MAKE IT LOOK GOOD, COMPLETE ALL ITEMS, ADD TRY CATCH, ETC
package HomePrac;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.*;
import javax.swing.JOptionPane;
public class FilePrinter {

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

    		PrintWriter outfile = new PrintWriter ("total.txt");

    		 JOptionPane.showMessageDialog(null, "Welcome to the tech store!", "Tech Store", 1);
    	 String fitems = "", str = "" , fitem="";
    	 int exit = 0;
    	 double total = 0;
         double totalall = 0;

         do
         {


       String items [] = {"Monitors", "Processors",  "Keyboards", "Mice", "Laptops"};
       String monimodel, procemodel, kbmodel, micemodel, lapmodel;

       //  Models:
       String[] monitorsm = {"BenQ EX3501R",  "Alienware AW3418DW",  "Asus ROG Swift PG27UQ"};
       String[] processorsm =  {"AMD Ryzen Threadripper 1950X" , "AMD Ryzen 5 1600X" , "Intel Core i5-7600K"};
       String[] keyboardsm = {"Corsair K70 RGB Mk.2", "Das Keyboard 4 Professional", "Razer BlackWidow Elite"};
       String[] micem = {"Logitech G502 Proteus Spectrum", "Logitech G300s", "Razer Atheris"};
       String[] laptopsm = {"Dell XPS 13", "Lenovo Yoga C930", "MSI GS65 Stealth"};

       String item = JOptionPane.showInputDialog("Please select the number of the item you are looking for. Here are our available ones:" +"\n" + "\n (1)Monitors" + "\n (2)Processors" + "\n (3)Keyboards" + "\n (4)Mice" + "\n (5)Laptops");
      // Monitors
     	switch (item) {

     	case "Monitor":
     	case "Monitors":
      	case "1":
      			JOptionPane.showMessageDialog(null, "You have chosen " +items[0]);
      			 monimodel = JOptionPane.showInputDialog("Please select the number of the model you want. These are our current available ones:" + "\n" +"(1)"+monitorsm[0] + "\n" + "(2)"+monitorsm[1] + "\n" + "(3)"+monitorsm[2]);

    	if (monimodel.equalsIgnoreCase("1"))
    				{
   				double m1price = 45000;

   				JOptionPane.showMessageDialog(null, "You have chosen " + monitorsm[0] + ". the price for this is " + m1price );

   				int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
   				total = totalprice (m1price,qty);

   				totalall = totalall + total;

   				JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +monitorsm[0]+ ". The price is " + total);

   				outfile.println(monitorsm[0]+":");

    				}

    	else if (monimodel.equalsIgnoreCase("2"))
    				{
       			double m2price = 50000;

       			JOptionPane.showMessageDialog(null, "You have chosen " + monitorsm[1] + ". the price for this is " + m2price );

       			int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
       			total = totalprice (m2price,qty);

   				totalall = totalall + total;

       			JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +monitorsm[1]+ ". The price is " + total);
       			outfile.println(monitorsm[1]+":");

    				}

    	else if (monimodel.equalsIgnoreCase("3"))
					{

				double m3price = 50000;

				JOptionPane.showMessageDialog(null, "You have chosen " + monitorsm[2] + ". the price for this is " + m3price );

				int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
				total = totalprice (m3price,qty);
				totalall = totalall + total;


				JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +monitorsm[2]+ ". The price is " + total);
				outfile.println(monitorsm[2]+":");

    	   		}
    	break;

     	case "processors":
     	case "Processors":
     	case "2":

     		JOptionPane.showMessageDialog(null, "You have chosen " +items[1]);
  			procemodel = JOptionPane.showInputDialog("Please select the number of the model you want. These are our current available ones:" + "\n" +"(1)"+processorsm[0] + "\n" + "(2)"+processorsm[1] + "\n" + "(3)"+processorsm[2]);

  			if (procemodel.equalsIgnoreCase("1"))
			{
			double m1price = 30000;

			JOptionPane.showMessageDialog(null, "You have chosen " + processorsm[0] + ". the price for this is " + m1price );

			int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
			total = totalprice (m1price,qty);

			totalall = totalall + total;

			JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +processorsm[0]+ ". The price is " + total);

			outfile.println(processorsm[0]+":");

			}

else if (procemodel.equalsIgnoreCase("2"))
			{
			double m2price = 25000;

			JOptionPane.showMessageDialog(null, "You have chosen " + processorsm[1] + ". the price for this is " + m2price );

			int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
			total = totalprice (m2price,qty);

			totalall = totalall + total;

			JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +processorsm[1]+ ". The price is " + total);
			outfile.println(processorsm[1]+":");

			}

else if (procemodel.equalsIgnoreCase("3"))
			{

		double m3price = 18000;

		JOptionPane.showMessageDialog(null, "You have chosen " + processorsm[2] + ". the price for this is " + m3price );

		int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
		total = totalprice (m3price,qty);
		totalall = totalall + total;


		JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +processorsm[2]+ ". The price is " + total);
		outfile.println(processorsm[2]+":");

   		}
  			break;

     	case "Keyboard":
     	case "keyboards":
     	case "3":

     		JOptionPane.showMessageDialog(null, "You have chosen " +items[2]);
     		kbmodel = JOptionPane.showInputDialog("Please select the number of the model you want. These are our current available ones:" + "\n" +"(1)"+keyboardsm[0] + "\n" + "(2)"+keyboardsm[1] + "\n" + "(3)"+keyboardsm[2]);

  			if (kbmodel.equalsIgnoreCase("1"))
			{
			double m1price = 8000;

			JOptionPane.showMessageDialog(null, "You have chosen " + keyboardsm[0] + ". the price for this is " + m1price );

			int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
			total = totalprice (m1price,qty);

			totalall = totalall + total;

			JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +keyboardsm[0]+ ". The price is " + total);

			outfile.println(keyboardsm[0]+":");

			}

  			else if (kbmodel.equalsIgnoreCase("2"))
			{
			double m2price = 9500;

			JOptionPane.showMessageDialog(null, "You have chosen " + keyboardsm[1] + ". the price for this is " + m2price );

			int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
			total = totalprice (m2price,qty);

			totalall = totalall + total;

			JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +keyboardsm[1]+ ". The price is " + total);
			outfile.println(keyboardsm[1]+":");

			}

  			else if (kbmodel.equalsIgnoreCase("3"))
			{

		double m3price = 12000;

		JOptionPane.showMessageDialog(null, "You have chosen " + keyboardsm[2] + ". the price for this is " + m3price );

		int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
		total = totalprice (m3price,qty);
		totalall = totalall + total;


		JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +keyboardsm[2]+ ". The price is " + total);
		outfile.println(keyboardsm[2]+":");

    	   		}
     	break;

     	case "Mice":
     	case "Mouse":
     	case "4":

     		JOptionPane.showMessageDialog(null, "You have chosen " +items[3]);
     		procemodel = JOptionPane.showInputDialog("Please select the number of the model you want. These are our current available ones:" + "\n" +"(1)"+micem[0] + "\n" + "(2)"+micem[1] + "\n" + "(3)"+micem[2]);

  			if (procemodel.equalsIgnoreCase("1"))
			{
			double m1price = 7000;

			JOptionPane.showMessageDialog(null, "You have chosen " + micem[0] + ". the price for this is " + m1price );

			int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
			total = totalprice (m1price,qty);

			totalall = totalall + total;

			JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +micem[0]+ ". The price is " + total);

			outfile.println(micem[0]+":");

			}

  			else if (procemodel.equalsIgnoreCase("2"))
			{
			double m2price = 3500;

			JOptionPane.showMessageDialog(null, "You have chosen " + micem[1] + ". the price for this is " + m2price );

			int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
			total = totalprice (m2price,qty);

			totalall = totalall + total;

			JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +micem[1]+ ". The price is " + total);
			outfile.println(micem[1]+":");

			}

  			else if (procemodel.equalsIgnoreCase("3"))
			{

		double m3price = 6500;

		JOptionPane.showMessageDialog(null, "You have chosen " + micem[2] + ". the price for this is " + m3price );

		int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
		total = totalprice (m3price,qty);
		totalall = totalall + total;


		JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +micem[2]+ ". The price is " + total);
		outfile.println(micem[2]+":");

    	   		}
    break;

       	case "Laptops":
     	case "Laptop":
     	case "5":

     		JOptionPane.showMessageDialog(null, "You have chosen " +items[4]);
     		procemodel = JOptionPane.showInputDialog("Please select the number of the model you want. These are our current available ones:" + "\n" +"(1)"+laptopsm[0] + "\n" + "(2)"+laptopsm[1] + "\n" + "(3)"+laptopsm[2]);

  			if (procemodel.equalsIgnoreCase("1"))
			{
			double m1price = 80000;

			JOptionPane.showMessageDialog(null, "You have chosen " + laptopsm[0] + ". the price for this is " + m1price );

			int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
			total = totalprice (m1price,qty);

			totalall = totalall + total;

			JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +laptopsm[0]+ ". The price is " + total);

			outfile.println(laptopsm[0]+":");

			}

  			else if (procemodel.equalsIgnoreCase("2"))
			{
			double m2price = 75000;

			JOptionPane.showMessageDialog(null, "You have chosen " + laptopsm[1] + ". the price for this is " + m2price );

			int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
			total = totalprice (m2price,qty);

			totalall = totalall + total;

			JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +laptopsm[1]+ ". The price is " + total);
			outfile.println(laptopsm[1]+":");

			}

  			else if (procemodel.equalsIgnoreCase("3"))
			{

		double m3price = 90000;

		JOptionPane.showMessageDialog(null, "You have chosen " + laptopsm[2] + ". the price for this is " + m3price );

		int qty = Integer.parseInt(JOptionPane.showInputDialog("Please enter quantity"));
		total = totalprice (m3price,qty);
		totalall = totalall + total;


		JOptionPane.showMessageDialog(null, "You have purchased " + qty + " of the " +laptopsm[2]+ ". The price is " + total);
		outfile.println(laptopsm[2]+":");

    	   		}

     	}
         }

       while (JOptionPane.showConfirmDialog(null, "Do you want to shop more?")==0);
         outfile.close();

         // Store items purchased:
         Scanner infile = new Scanner (new FileReader("total.txt"));
         infile.useDelimiter(":");

         while (infile.hasNext()) {

             fitems = infile.next();
             infile.nextLine();
             str = str + fitems + "\n";

         }

         JOptionPane.showMessageDialog(null, "The items you purchased are:\n" + str);

         // UPDATE ITEM INCOMPLETE

         int update = JOptionPane.showConfirmDialog(null, "Do you want to update your purchase?");

         if (update==0)
         {
        	 String sitem = JOptionPane.showInputDialog(null, "Search for item name");


             Scanner ifile = new Scanner (new FileReader("total.txt"));
             ifile.useDelimiter(":");
              boolean found = false;

              while (ifile.hasNext()) {

                 fitem = ifile.next();

                 ifile.nextLine();


                 if (fitem.equalsIgnoreCase(sitem)){
                     JOptionPane.showMessageDialog (null, "Item: " + fitem ,  "Item Found", 1);
                     found = true;
                 }
                 ifile.close();
                 if (!found){
                 JOptionPane.showMessageDialog(null,"Item not found", "Error", 1);
         }

        	 JOptionPane.showMessageDialog(null, "\nThank you for shopping with us! The total of your purchase is " + String.format("%.2f",totalall), "Checkout",1);
              }}
    }
    public static double totalprice(double x, double y) {

    	double z = x*y;
    	return z;
    }
}