Readers have returned quite a bit of feedback concerning, “Abstract Classes Vs. Interfaces” from April 2001. A recurring request asks to see a complete example of using interfaces and abstract classes ...
The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...
Take advantage of default interface methods in C# 8.0 to add new methods to an interface without breaking existing implementations. One of the new and interesting features in C# 8.0 is the support for ...
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