once user press 2 times y and the next time n, when enter n how to add item1 and item2 and display total price

once the user presses 2 times y and the next time n when they enter n how to display the total price of item1 and item2

import java.util.Scanner;
import javax.swing.JOptionPane;
public class ITPL_Coursework {
public static void main(String[] args) {
String itemStr ;
String quantityStr;
final double tax=0.03;
double total = 0;
int price;
char choice;
// System.out.print("\nEnter number of the hardware component you want: "); 
System.out.println("\tHari's Hardware Company ");
System.out.println("\t-----------------------");
System.out.println("\nAvailable hardware components and its price are listed below: \n1:HYPERX FURY RAM \n2:Graphics Card");
do{
itemStr=JOptionPane.showInputDialog("Enter number of the hardware component you want: ");
int item=Integer.parseInt(itemStr);
quantityStr=JOptionPane.showInputDialog("Enter the quanity of the hardware component you want:");
int quantity=Integer.parseInt(quantityStr);
if(item==1){
price=1500;
total=(tax*(price*quantity));
System.out.println("You choose to buy HYPERX FURY RAM for: " +total);
}
if(item==2){
price=1000;
total=(tax*(price*quantity));
System.out.println("You choose to buy Graphics Card for: " +total);              
}
System.out.print("Do you want to continue y/n?:");
Scanner console = new Scanner(System.in);
choice=console.next().charAt(0);
}
while(choice=='y');
System.out.println(""+total);
}
}

total=(tax*(price*quantity));

This only assigns total to be the current cost. If you want to sum all costs, then you need to use +=:

total += (tax*(price*quantity));