Cannot instantiate the type List<Product>

原创于 2013-10-06 18:42:26 发布 · 1.7k 阅读

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本文解释了一个常见的Java编程错误：尝试直接实例化List接口而非使用其实现类（如ArrayList）。展示了正确的创建List实例的方法。

List is an interface. Interfaces cannot be instantiated. Only concrete types can be instantiated. 
You probably want to use an ArrayList, which is an implementation of the List interface.
List<Product> products = new ArrayList<Product>();

I have the following code:

List<Product> product = new List<Product>();

The error:

Cannot instantiate the type List<Product>