java - 如何创建DRYer构造函数

有什么办法可以减少以下任何构造函数的重复性？即只使用一个构造函数或没有多个“ topping.add”调用？我的目标是要有一个披萨，可以有1个，2个或3个不同的浇头

private PizzaBase base;
List<PizzaTopping> toppings = new ArrayList<PizzaTopping>();

public Pizza(PizzaBase base, PizzaTopping topping) //Constructor for pizza with 1 topping
{
    setBase (base);
    toppings.add(topping);
}

public Pizza(PizzaBase base, PizzaTopping topping, PizzaTopping topping2) //Constructor for pizza with 2 toppings
{
    setBase (base);
    toppings.add(topping);
    toppings.add(topping2);
}

public Pizza(PizzaBase base, PizzaTopping topping, PizzaTopping topping2, PizzaTopping topping3) //Constructor for pizza with 3 toppings
{
    setBase (base);
    toppings.add(topping);
    toppings.add(topping2);
    toppings.add(topping3);

}

最初，我考虑使用for循环将提供的浇头添加到列表中，但是我不确定如何遍历构造函数提供的值

最佳答案

使用varargs，您可以根据需要使用任意多个浇头，而不必担心在构造函数中使用它，您可以将其视为一个列表

private PizzaBase base;
List<PizzaTopping> toppings = new ArrayList<PizzaTopping>();

public Pizza(PizzaBase base, PizzaTopping... toppings) //Constructor for pizza with 1 topping
{
    setBase (base);
    for(PizzaTopping topping : topings)
        toppings.add(topping);
}