Question

Use the code supplied to display the Customers, Products, and Prices . Also show the total and average prices package

arraylist3;

import java.util.ArrayList;

import javax.swing.JOptionPane;

public class Arraylist3 {

public static void main(String[] args) {

private static ArrayList customers = new ArrayList<>()

; private static ArrayList products = new ArrayList<>();

private static ArrayList price = new ArrayList<>();

private static int x = 0;

public static void main(String[] args) {

x = Integer.parseInt(JOptionPane.showInputDialog(null,"Enter the number of customer")); input_customers(); display_sales_report(); } private static void input_customers(){ for(int y = 0;y < x; y++){ customers.add(JOptionPane.showInputDialog(null,"Please enter the customer :"+(y+1))); products.add(JOptionPane.showInputDialog(null,"Please enter the product :" + customers.get(y))); price.add(Double.parseDouble(JOptionPane.showInputDialog(null,"Please enter the price :R" + products.get(y)))); } } private static void display_sales_report(){ } } } }

Answer 1

The java code after modifying the given code is as follows:

//importing the necessary components
import java.util.ArrayList;
import javax.swing.JOptionPane;
public class Arraylist3 
{
public static void main(String[] args) 
{
//declaring the variable arraylists    
private static ArrayList customers = new ArrayList<>();
private static ArrayList products = new ArrayList<>();
private static ArrayList price = new ArrayList<>();
private static int x = 0;
//main method
public static void main(String[] args) 
{
x = Integer.parseInt(JOptionPane.showInputDialog(null,"Enter the number of customers"));
input_customers();
display_sales_report();
}
// method to take inputs
private static void input_customers() 
{
    for(int y = 0;y < x; y++)
    { 
        customers.add(JOptionPane.showInputDialog(null,"Please enter the customer :"+(y+1)));
        products.add(JOptionPane.showInputDialog(null,"Please enter the product :" + customers.get(y)));
        price.add(Double.parseDouble(JOptionPane.showInputDialog(null,"Please enter the price :R" + products.get(y))));
    }
} 
//method to display the output
private static void display_sales_report() 
{
    float sum=0;
    for(int i=0;i<price.size();i++)
    {
        sum=sum+price.get(i);    
    }
    JOptionPane.showMessageDialog(null,"Total prices:"+ sum);
    float average=0;
    average=sum/price.size();
    JOptionPane.showMessageDialog(null,"Average of prices: "+ average);
} 
    
}