KwickClips Java · 41 sec · free
Why can my child class not see a field?
Short answer. It is probably private, which stays in its own class.
Which modifier shares data with children?
protected.
Who can use it
| Modifier | Child class? |
|---|---|
| private | no |
| default | same package |
| protected | yes |
| public | yes |
Remember
| protected: package + children |
| private: this class only |
Your child class cannot see a field. Why? Check the modifier. Private hides it from children. Default works in one package. Protected allows children. Public allows all. Protected shares with children. Private stays in one class.
This clip is from the full lesson: Inheritance in Java: extends, super and Method Overriding — 8 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 10 Computer Applications (165), ICSE Class 9 Computer Applications, ISC Class 12 Computer Science (868), ISC Class 12 Computer Science (868)
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