How do you know when a class should be abstract?
21739
When to use abstract classes?
66645
Abstract methods in Java
5245
When should I use an interface in java?
27458
Can an abstract class have a constructor?
90035
Creating the instance of abstract class or anonymous class
75499
Determine if a Class implements a interface in Java
55202
Why doesn't an interface work but an abstract class does with a generic class constraint?
60490
Why would one declare an immutable class final in Java?
128058
Why java.lang.Object is not abstract?
146924
When we should go for a Singleton class in Java?
150519
When should you use a local class in Java?
112406
Abstract types versus type parameters
9307
Abstract class in Java
45053
When should I write Static Methods?
30244
Is there any way to tell the compiler, inside the main file body, how to find the class?
31437
When should you use a class vs a struct in C++?
6853
Interface vs Abstract Class (general OO)