KwickClips Java · 44 sec · free
Can a subclass use a private member?
Short answer. No. Use protected if the child class needs it.
Can a local variable be private?
No. Local variables never take an access specifier.
Visibility rules
| private: hidden from subclasses |
| protected: subclasses can use |
| No specifier on local variables |
Remember
| Child needs it? Use protected |
| Nobody else? Use private |
Can a subclass use its parent's private data? No. Three exam rules. Private stays hidden, even from a subclass. Protected is open to subclasses. Local variables take no specifier. Child needs it? Protected. Nobody else? Private.
This clip is from the full lesson: Access Specifiers, Encapsulation and Visibility — 5 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 9 Information Technology (402), ICSE Class 9 Computer Applications, ICSE Class 10 Computer Applications, ICSE Class 10 Computer Applications
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