/** * 进货 * @param className 赢料名 * @param amount 数量 * @throws NoSuchMethodException * @throws InvocationTargetException * @throws InstantiationException * @throws IllegalAccessException */ public void order(String className , int amount) throws NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException, ClassNotFoundException { //在此补充代码 }

可以使用反射机制来实现进货方法，代码如下：

/**       
* 进货       
* @param className 饮料名       
* @param amount 数量       
* @throws NoSuchMethodException       
* @throws InvocationTargetException       
* @throws InstantiationException       
* @throws IllegalAccessException       
*/      
public void order(String className , int amount) throws NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException, ClassNotFoundException {          
    Class<?> clazz = Class.forName(className);          
    Constructor<?> constructor = clazz.getConstructor();          
    for(int i = 0; i < amount; i++){              
        repository[quantity++] = (Beverage)constructor.newInstance();          
    }       
}