salesformatter.java

SSD3 Ex5 答案 。

import  java.util.*;
/**
 * This interface defines a method that obtains a string
 * representation of a {@link Sales} object.
 *
 * @author ll
 * @version  1.0.0
 * @see Sales
 */

public interface SalesFormatter {
	
	public String formatSales(Sales sales);

}