How to extend multiple utility classes
28720
Can I extend a class using more than 1 class in PHP?
104815
Redefine Class Methods or Class
35865
Can enums be subclassed to add new elements?
133544
Is there a way to instantiate a class by name in Java?
23463
Can a java file have more than one class?
76090
How can I share a variable or object between two or more Servlets?
17428
Is there a way to override class variables in Java?
115894
Extend a generic type in Java
39541
Inheriting Options?
42892
How do I check (at runtime) if one class is a subclass of another?
69910
Extending an enum via inheritance
131313
Way to expand code block
101386
What's the best way to refactor a method that has too many (6+) parameters?
101098
Field extensions with(out) a common extension
23915
How do I extend a List in Dart?
130481
calling init for multiple parent classes with super?
140302
Testing a class that has multiple callouts?