Detecting missing strings
The sales data for your coffee shop may contain data entry errors like empty fields or whitespaces. Check the sample sale for these errors, and print messages to display a default value or to indicate the issue.
The necessary packages such as Objects, and StringUtils have been imported for you.
This exercise is part of the course
Cleaning Data in Java
Exercise instructions
- Return
coffeeNamewith a default name if null. - Check if
paymentMethodis empty or whitespace.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
public class CoffeeSalesExample {
private record CoffeeSales(LocalDate date, String coffeeName,
String paymentMethod, Integer quantity, Double amount) {
}
public static void main(String[] args) {
CoffeeSales sale = new CoffeeSales(LocalDate.of(2024, 3, 1), null, " ", 1, 6.26);
// Return coffeeName with a default if null
String coffeeName = ____.____(sale.coffeeName(), "[No coffee name]");
System.out.println("coffeeName: " + coffeeName);
// Check if paymentMethod is empty or whitespace
if (____.____(sale.paymentMethod())) {
System.out.println("Payment method cannot be empty or whitespace");
}
}
}