product.java

ssd2 exercise3 的题目和答案

public class Product
{
	
	/* code */
    private String code;
    
    /* description */
    private String description;
    
    /* price */
    private double price;
    
    /**
	 * Constructs an <code>Product</code> object.
	 *
	 * @param initialCode  a string with the code of the product.
	 * @param initialDescription  a string that describes the product.
	 * @param initialPrice  a double that represents the price of the product.
	 */
    public Product(String initialCode, String initialDescription, double initialPrice)
    {
        code = initialCode;
        description = initialDescription;
        price = initialPrice;
    }
	
	/**
	 * Returns the code of the product.
	 *
	 * @return  code of the product.
	 */
    public String getCode()
    {
        return code;
    }
	
	/**
	 * Returns the description of the product.
	 *
	 * @return  description of the product.
	 */
    public String getDescription()
    {
        return description;
    }
	
	/**
	 * Returns the price of the product.
	 *
	 * @return  price of the product.
	 */
    public double getPrice()
    {
        return price;
    }

	/**
	 * Two <code>Product</code> objects are equal if their codes
	 * are equal (overrides the {@link Object#equals(Object)} method).
	 *
	 * @param object  object with which this <code>Product</code>
	 *                is to be compared.
	 * @return  <code>true</code> if the argument is an
	 *          <code>Product</code> object <i>and</i> the code of
	 *          the argument is equal to the code of this
	 *          <code>Product</code>; <code>false</code> otherwise.
	 */
    public boolean equals(Object object)
    {
        return (object instanceof Product) && getCode().equals(((Product)object).getCode());
    }
	
	
	/**
	 * Returns the string representation of this <code>Product</code>
	 * object (overrides the {@link Object#toString()} method).
	 *
	 * @return  the string representation of this <code>Product</code>
	 *          object.
	 */
    public String toString()
    {
        String message = getCode() + "_" + getDescription() + "_" + getPrice();
        return message;
    }
}