Why a Map with superclass values can't accept subclass objects?
5495
Is List a subclass of List? Why are Java generics not implicitly polymorphic?
89052
When overriding equals in Java, why does it not work to use a parameter other than Object?
154167
How do you set attributes on SubValues?
4356
What's wrong with overridable method calls in constructors?
73545
Why is constructor of super class invoked when we declare the object of sub class? (Java)
109376
Is indexing a new map element and having something that reads it assigned to it undefined behaviour, or just unspecified?
90248
Objective-C: How do you access parent properties from subclasses?
10035
Java map with values limited by key's type parameter
131282
How do you cast a List of supertypes to a List of subtypes?
146710
What requirements must std::map key classes meet to be valid keys?
105261
What's the reason I can't create generic array types in Java?
38263
How can I combine two HashMap objects containing the same types?
74279
Using an sObject as a Map key
44106
Subfiles failing with custom class
25288
How to make HashMap work with Arrays as key?
64929
Map of with object references as keys?
142824
Why can't this() and super() both be used together in a constructor?