Get generic type of java.util.List

Question

I have;

List stringList = new ArrayList();
List integerList = new ArrayList();

Is

Answer 1

At runtime, no, you can't.

However via reflection the type parameters are accessible. Try

for(Field field : this.getDeclaredFields()) {
    System.out.println(field.getGenericType())
}

The method getGenericType() returns a Type object. In this case, it will be an instance of ParametrizedType, which in turn has methods getRawType() (which will contain List.class, in this case) and getActualTypeArguments(), which will return an array (in this case, of length one, containing either String.class or Integer.class).