Question

Is it possible to save a Type in a variable,
in order to instantiate a List of this type?

//something like that
Type type = Boolean;
List<type> list = new List<type>();
list.add(true);

Answer 1

For the first requirement, you are looking for Class:

Class type = Boolean.class;

However, I don’t think the seconds requirement is feasible, since generic types only exist at compile time:

List<type> list = new List<type>(); // invalid code

You can, however, work with List<Object>. It will accept Boolean objects. Whether this will buy you anything untlimately depends on your use case.