Order.Java

public class Order {

    private String customerName;
    private int numberOfGarments;

    public Order() {
        this.customerName = "";
        this.numberOfGarments = 0;
    }
    public Order(String customerName) {

        this(customerName, 0);
    }

    public Order(String customerName, int numberOfGarments) {

        this.customerName = customerName;
        this.numberOfGarments = numberOfGarments > -1 ? numberOfGarments : 0;
    }

    public void setCustomerName(String customerName) {

        this.customerName = customerName;
    }

    public void setNumberOfGarments(int numberOfGarments) {

        this.numberOfGarments = numberOfGarments > -1 ? numberOfGarments : 0;
    }

    public String getCustomerName() {

        return this.customerName;
    }

    public int getNumberOfGarments() {

        return this.numberOfGarments;
    }

    public double calculateCharge(double charge) {

        return (charge > -1.0) ? (numberOfGarments * charge) : 0.0;
    }
}