complete all parts
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+20
-9
@@ -15,15 +15,26 @@ public class Main {
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}
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Scanner scanner = new Scanner(input);
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// TODO:
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// - Read each line from products.csv
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// - For each line, parse productId, name, and price
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// - The format of the file is like this:
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// [productId],[name],[price]
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// - Store Product objects in the productCatalog ArrayList
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// NOTE
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// - The data in products.csv is guaranteed to be valid.
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while (scanner.hasNextLine())
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{
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String line = scanner.nextLine();
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String[] parts = line.split(",");
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if(parts.length == 3)
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{
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try
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{
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int id = Integer.parseInt(parts[0]);
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String name = parts[1];
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double price = Double.parseDouble(parts[2]);
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productCatalog.add(new Product(id, name, price));
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}
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catch (NumberFormatException e)
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{
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System.err.println("Invalid format in products.csv: " + line);
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}
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}
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}
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scanner.close();
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}
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public static void main(String[] args)
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@@ -1,3 +1,7 @@
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import java.io.BufferedReader;
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import java.io.FileReader;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.util.List;
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public class ReportGenerator {
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@@ -17,67 +21,84 @@ public class ReportGenerator {
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public void processFile()
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{
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// TODO:
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// 1. Open the order details CSV file
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// 2. Read the file line by line
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// 3. Split each line using comma delimiter
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// (each line is guaranteed to contain exactly two commas)
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// 4. Each line contains exactly 3 values in the format:
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// [productId],[quantity],[discountPercent]
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// 5. Attempt to convert values:
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// - productId -> int
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// - quantity -> int
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// - discountPercent -> int
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// NOTE:
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// - quantity and discountPercent may contain invalid characters
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// (e.g., letters instead of numbers).
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// - If parsing any value fails (NumberFormatException),
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// the entire line must be considered invalid.
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// - Use try-catch blocks and exception handling to safely
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// handle parsing and validation errors without stopping
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// the processing of the remaining lines.
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// 6. Validate parsed values:
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// - productId must be greater than 0
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// - quantity must be greater than 0
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// - discountPercent must be between 0 and 99 inclusive
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// 7. Look for a Product in productList that matches productId
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// 8. If no Product with that ID exists in the catalog,
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// the entire line is considered invalid
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// 9. If all values are valid and the product exists, calculate:
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// subtotal = quantity * product price
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// discountValue = subtotal * discountPercent / 100
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// finalCost = subtotal - discountValue
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// 10. Update report totals:
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// - totalQuantity += quantity
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// - totalFinalCost += finalCost
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// - totalDiscountValue += discountValue
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// 11. If any parsing error, validation failure, or missing product occurs:
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// - increment totalInvalidLines
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// - skip the line and continue processing the next line
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// 12. Close all file resources
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try (BufferedReader reader = new BufferedReader(new FileReader(ordersFilePath)))
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{
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String line;
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while ((line = reader.readLine()) != null)
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{
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String[] parts = line.split(",");
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if (parts.length != 3)
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{
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totalInvalidLines++;
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continue;
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}
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try
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{
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int id = Integer.parseInt(parts[0]);
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int quantity = Integer.parseInt(parts[1]);
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int discountPercent = Integer.parseInt(parts[2]);
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if (id <= 0 || quantity <= 0 || discountPercent < 0 || discountPercent > 99) {
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totalInvalidLines++;
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continue;
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}
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Product product = findProductById(id);
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if (product == null)
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{
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totalInvalidLines++;
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continue;
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}
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double subtotal = quantity * product.getPrice();
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double discountValue = subtotal * discountPercent / 100.0;
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double finalCost = subtotal - discountValue;
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totalQuantity += quantity;
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totalFinalCost += finalCost;
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totalDiscountValue += discountValue;
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}
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catch (NumberFormatException e)
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{
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totalInvalidLines++;
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}
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}
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}
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catch (IOException e)
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{
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System.err.println("Error reading order file: " + e.getMessage());
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}
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}
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private Product findProductById(int id) {
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for (Product p : productList) {
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if (p.getProductID() == id) {
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return p;
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}
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}
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return null;
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}
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public void saveReport()
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{
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// TODO:
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// 1. Build a formatted report string
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// 2. Include:
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// - total quantity
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// - total final cost
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// - total discount value
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// - total invalid lines
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// 3. Create/open output report file (name it report.txt)
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// 4. Write report string into file
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// 5. Handle file writing exceptions
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// 6. Close writer resources
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/* Example Structure
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========= SALES REPORT =========
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Total Quantity Sold: 42
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Total Final Cost: $1520.75
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Total Discount Value: $230.50
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Invalid Rows: 3
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================================
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*/
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String report = String.format(
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"========= SALES REPORT =========\n" +
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"Total Quantity Sold: %d\n" +
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"Total Final Cost: $%.2f\n" +
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"Total Discount Value: $%.2f\n" +
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"Invalid Rows: %d\n" +
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"================================\n",
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totalQuantity,
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totalFinalCost,
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totalDiscountValue,
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totalInvalidLines
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);
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try (FileWriter writer = new FileWriter("report.txt"))
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{
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writer.write(report);
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}
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catch (IOException e)
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{
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System.err.println("Error saving report: " + e.getMessage());
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}
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}
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}
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