Type parameter vs unbounded wildcard
Java generics: wildcard<?> vs type parameter<E>?
Generics Java, unbounded wildcard Java Generics - Unbounded wildcard allows mixture of different types (no warning) Can java variables be an unbounded wildcard? Unbounded and wait-free? Wildcard VS T - getting and adding to a list Java wildcard error Why this wildcard works? Unbounded wildcard passed to method Why there is no warning while casting from object to unbounded wildcard collection? Adding data to a collection with unbounded wildcard type Java generics with unbounded wildcard? what is the difference between Void and unbounded wildcard in Java generics? Find all unbounded elements in XmlSchemaElement Casting bounded wildcard to unbounded wildcard within a generic type is an error (X<Y<? extends T>> to X<Y<?>> How to get the value of a wildcard in a string Java? Understanding Raw vs Unbounded Wildcard in Static Nested Class Type Definition Java Generics: unbounded wildcard generalization not working past second level With Java, is it acceptable to use an unbounded wildcard type as a method's argument, and then check and cast it to a parameterized type? Difference between ? (wildcard) and Type Parameter in Java Using an Object as argument on unbounded wildcard reference object Generics - Cannot add to a List with unbounded wildcard Java Method Unbounded Type or Class Return What's the difference between unbounded wildcard type List<?> and raw type List? What is the practical usage of an array of an unbounded wildcard parameterized type? Problem with unbounded Java Generic interface Unbounded wildcard generic array from supplier in enum Java Generics: On arraylist (unbounded wildcard type), add and addAll methods behaves differently Java Generics - What's really in a unbounded wildcard?