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I want to create a class, ClassB, as inner class of ClassA, but I want to write down outside ClassA.java file.
How can I do this?
It will be a lot of inner class, and ClassA.java file will be enormous.
UPDATE
What I really want to do is define ten classes that they will be only accessible by one class. All of them are defined inside the same package.
Thanks.
815
To instantiate an inner class, you must first instantiate the outer class. Then, create the inner object within the outer object with this syntax: OuterClass outerObject = new OuterClass(); OuterClass. InnerClass innerObject = outerObject.
Inner Class You just need to write a class within a class. Unlike a class, an inner class can be private and once you declare an inner class private, it cannot be accessed from an object outside the class.
If the inner class defined as private and protected, can outer class access the members of inner class? Yes.
Java inner class can be declared private, public, protected, or with default access whereas an outer class can have only public or default access.
The simple answer, is no you cannot.
By virtue of being an inner class, the class has to be inside the scope of the parent class.
If your class is really going to be enormous, it probably says something about the design of your class. Are you making proper use of encapsulation?
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