delete

package asd;

import java.io.*;
import java.util.Scanner;

import javax.swing.JOptionPane;

public class java2 {

	public static final String [] numofitem = {"100","200","300","400","500"};
	public static final String [] newnumofitem = {"600","700","800","900","1000"};

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub


		WELCOME();
		int count = 0;

		String [] option = { "Add Item", "Delete Item", "Update Item", "View Item", "Exit"};


		do {
			String opt = (String) (JOptionPane.showInputDialog(null, "Choose:", "Snackwise Inventory System", JOptionPane.QUESTION_MESSAGE, null, option, option[0]));

		switch (opt)
		{
		case "Add Item" :
			additem();
			break;

		case "Update Item" :
			updateitem();
			break;

		case "Delete Item" :
			deleteitem();
			break;

		case "View Item" :
			viewitem();
			break;

		case "Exit" :
			System.exit(0);
			break;

		}
		}

		while (count == 0);
	}

	public static void WELCOME() {
		JOptionPane.showMessageDialog(null, "Welcome to Snackwise Inventory System!");
	}


	public static void additem () throws IOException {

		String item;
		int qty, price;

		PrintWriter a = new PrintWriter(new FileWriter("fdi.txt", true));

		do {

			item = JOptionPane.showInputDialog("Please enter item: ");
			qty = Integer.parseInt((String)(JOptionPane.showInputDialog(null, "Choose quantity", "QTY", 1, null, numofitem, numofitem[0])));
			price = Integer.parseInt(JOptionPane.showInputDialog("Please enter the item price: "));


			a.println(item+ ":" +qty+ ":" +price+ ":");

			JOptionPane.showMessageDialog(null, "Item has successfully added! ", "Snackwise Inventory System",1);

		}
		while
			(JOptionPane.showConfirmDialog(null, "Add More Items? ")==0);
		a.close();
	}

	public static void updateitem () throws IOException {

		String str = "";
		String item, slct = "", update, new_item = "";
		int qty, price, new_qty, new_price;
		boolean found = false;

		update = JOptionPane.showInputDialog("Select to Update");
		Scanner x = new Scanner (new FileReader("fdi.txt"));
		x.useDelimiter(":");


		while (x.hasNext()) {

			item = x.next();
			qty = x.nextInt();
			price = x.nextInt();
			x.nextLine();

		if(item.equalsIgnoreCase(update))
		{
			found = true;
			new_item = JOptionPane.showInputDialog(null, "New Item: ");
			new_qty = Integer.parseInt((String)(JOptionPane.showInputDialog(null, " Choose New Number of Items:", "NQTY",1, null, newnumofitem, newnumofitem[0])));
			new_price = Integer.parseInt(JOptionPane.showInputDialog(null, "New Price Item: "));

			str += new_item+ ":" +new_qty+ ":" +new_price+ ":" +"\n";

		}
		else
			str += item+ ":" +price+ ":" +slct+ ":" +qty+ ":" +"\n";

		}

		x.close();

		PrintWriter b = new PrintWriter(new FileWriter("fdi.txt"));
		b.println(str);
		b.close();

		if(!found)
			JOptionPane.showMessageDialog(null, "Item not found!", "Snackwise Inventory System",1 );
		else
			JOptionPane.showMessageDialog(null, "Item has successfully updated!");

	}

	public static void deleteitem () throws IOException {

		String str = "";
		String item, slct = "", update, new_item = "";
		int qty, price, new_qty, new_price;
		boolean found1 = false;

		update = JOptionPane.showInputDialog("Select to Delete");
		Scanner x = new Scanner (new FileReader("fdi.txt"));
		x.useDelimiter(":");

		while (x.hasNext()) {

			item = x.next();
			new_price = x.nextInt();
			new_qty = x.nextInt();
			x.nextLine();

			if(!item.equalsIgnoreCase(update))
			{
				str += item+ ":" +new_price+ ":" +slct+ ":" +new_qty+ ":" +"\n";
			}

				else found1 = true;
			}

			PrintWriter b = new PrintWriter(new FileWriter("fdi.txt"));
			b.println(str);
			b.close();
			x.close();

			if(found1)
				JOptionPane.showMessageDialog(null, "Item has successfully deleted!");
				else
					JOptionPane.showMessageDialog(null, "Item not found", "Snackwise Inventory System",1);

	}
	public static void viewitem () throws IOException {

		String str = "";
		Scanner x = new Scanner (new FileReader("fdi.txt"));
		x.useDelimiter(":");
		boolean found2 = false;

		str = JOptionPane.showInputDialog("Select to View");


		while (x.hasNext()) {

			String item = x.next();
			int qty1 = x.nextInt();
			int price = x.nextInt();
			x.nextLine();

			if(item.equalsIgnoreCase(str))
			{
				found2 = true;
				JOptionPane.showMessageDialog(null, "Item: " + item + "\n"
													+"Number of Items: " + qty1 + "\n"
													+"Price Item: " + price + "\n", "Snackwise Inventory System", 1);
				break;
			}
		}
		if(!found2) {
			JOptionPane.showMessageDialog(null, "Item not found", "SnackWise Inventory System",1);

		}

		x.close();


	}
	}