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class type paramaters
So am getting comfortable with generics as I go trough my Thinking in java book. I understand concept and how easier things can be with generics, like when creating constructor , method or even a field. But I just can not understand why do in most of examples they are in the class declaration like : public class LinkedStack<T> {}. please help me understand
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Re: class type paramaters
It doesn't make much sense to use instance-level generics without a class-level generic declaration.
For example:
class ClassA { T b; T getB(T param) { return b; } }
Is field b expected to be a generic type, or is there actually class T? There's no way to tell. You must specify a class generic in order to clarify this.
class ClassA<T> { T b; T getB(T param) { return b; } }
Now it's understood that T is a generic type, and every instance of T should be replaced by the actual type.
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