| Abstract | Interface | |
|---|---|---|
| method | abstract and concrete | abstract only, support default and static method |
| multiple inheritance | no (extend one class) | yes (extends multiple interfaces) |
| variables | final, non-final, static and non-static default: declared as public, static, final |
static, final |
| implementation | provides interface implementation | doesn't provide abstract class implementation |
| constructor | allowed | not allowed |
| keyword | abstract (implicit: public, abstract) | interface |
| inheritance | implements multiple interfaces but can extend one class |
extends multiple interfaces |
Sunday, April 9, 2017
Abstraction vs Interface
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