Sollicitatievraag bij Google
What is the difference between an interface an an abstract class in Java?
Antwoord op sollicitatievraag
Anoniem
29 jan 2012
- Interfaces represent qualities/attributes (e.g. "Sortable", "Comparable", etc.), whereas an abstract class usually represents a noun. - Classes can implement multiple interfaces, but can only extend a single abstract class. - Abstract classes can provide implementations for some methods, and can contain instance variables, whereas interfaces cannot.
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