Get type name for generic parameter of generic class [duplicate]

Answer 1

You can get the name of the generics from the subclass. See this example. We Define a parent class like this:

public class GetTypeParent<T> {

    protected String getGenericName()
    {
        return ((Class<T>) ((ParameterizedType) getClass()
                .getGenericSuperclass()).getActualTypeArguments()[0]).getTypeName();
    }
}

We then define its child class in this way:

public class GetTypeChild extends GetTypeParent<Integer> {
    public static void main(String[] args) {
        GetTypeChild getTypeChild = new GetTypeChild();
        System.out.println(getTypeChild.getGenericName());
    }
}

You can see that in the main method, or in any instance method, I am capable to get the name of the generics type, in this case the main will print: java.lang.Integer.