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A non-static member class is member class without the keyword static in its declaration. Its declaration is directly enclosed inside a class or an interface declaration. It is declared as:
public class OuterOne {
class InnerOne{
}
}
When the above code is compiled, two files are generated, OuterOne.class and OuterOne$InnerOne.class. The member inner class is a member of enclosing class. Just like other members of a class, it can be declared as public, private, protected or default/friendly.
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A top-level class cannot be declared as private or protected, but a member class can be. |
Similar to private members of a class, a private member class is accessible only within the enclosing class. A protected member class is accessible to the enclosing class, all the subclasses of enclosing class and all the classes within same package as of the enclosing class. For example:
package com.example.scjp.studykit;
public class OuterOne {
protected class InnerOne{
}
}
The protected member inner class InnerOne will be accessible to OuterOne, all the subclasses of OuterOne and all the classes in package com.example.scjp.studykit.
