OrderTester.java

import java.util.Scanner;

public class OrderTester {

    public static void main(String []args) {

        Scanner scan = new Scanner(System.in);

        Order firstOrder = new Order(); // invoking no-args constructor
        firstOrder.setCustomerName("Michael");
        firstOrder.setNumberOfGarments(100);
        System.out.println(firstOrder.calculateCharge(99.98));

        Order secondOrder = new Order("Alex"); // invoking 1-parameter/overloaded constructor
        System.out.println(secondOrder.getCustomerName());

        // Invoking third parametrized constructor
        Order thirdOrder = new Order("Marie",5);
        System.out.println(thirdOrder.getCustomerName());
    }
}