Add generic type parameters to your Pager variables:
List<MyType1> list1 = new ArrayList<Mytype1>();
List<MyType2> list2 = new ArrayList<Mytype2>();
Pager<MyType1> pager1 = new Pager<MyType1>(
page,
amount,
list1;
);
list1 = pager1.getData();
Pager<MyType2> pager2 = new Pager<MyType2>(
page,
amount,
list2
);
list2 = pager2.getData();