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ArrayList Java BlueJ
原标题:ArrayList Java BlueJ

我有4个班级(Car(超级阶级)、CartoRent、CartoSell和CarCompany)。 CarCompany在建筑商中创建了一个GUI。 我需要将阿雷罗清单储存在CarCompany。 我如何这样做? 请提供帮助。

此外,CarCompany的主要方法目前是:

public static void main(String[] args)
{
  CarCompany = new CarCompany();
}

这一点是正确的。

问题回答

没有任何不正确之处,你只指明了一种类型,但你没有给它一个名字:

审判:

public static void main(String[] args)
{
  CarCompany myCarCompany= new CarCompany();
}

现在my CarCompany的一个目标。 CarCompany

Compiling

当你从民主选举学会内部或从指挥线收集资料时,汇编者将发现这些错误,并告诉你错误。 必须能够自行测试和辩论守则,因为有时没有人会提供帮助。

First, it should be CarCompany carCompany = new CarCompany();

第二,如果这四类课程的级别相同,请参见Car,则你可以这样作:

List<Car> cars = new ArrayList<Car>();
//and then
cars.add(new Car());
cars.add(new CarToRent());
// etc...

如果他们没有同样的超级班级,那么你就需要把他们列入<代码>。 List<Object> or in four different list.





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