inner class

[kevin goon]

package foo;
public class Outer
public static class Inner
Which statement true?
a. An instance of the Inner class can be constructed
statement with "new Outer.Inner()"
b. An instance of the Inner class can't be constructed
outside of package foo
c. An instance of the Inner class can only be constructed
from within the Outer class
d. From within the package bar, an instance of the Inner
class can be constructed statement with "new Inner()"
ans : a) but Why is b incorrect? Isnt b true since tha package statement is declared??

[Jane Griscti]

Hi Kevin,
You're correct. You can create a <code>Outer.Inner</code> class from outside the package. The following two examples compile and run without error.

// Source file created in 'foo' directory
package foo;
public class Outer {
    public static class Inner{
        public void display() {
            System.out.println("I'm a new Outer.Inner");
        }
    }
    
    public static void main(String[] args) {
        new Outer.Inner();
    }
}    
// Source file created above 'foo' directory
import foo.Outer;
public class TestFoo {
    public static void main(String[] args) {
       new Outer.Inner().display();
    }
}

Hope that helps.
------------------
Jane Griscti
Sun Certified Programmer for the Java� 2 Platform

[kevin goon]

thank you for your reply
I tried to compile your coding but for some reason it didnt work. I throws NoClassDefFoundException
Let me just make sure if I understood right.
So the answer choice B would be incorrect from my original question right?? since you CAN create instance outside package b importing the file.
How about if you remove the import statement from your subclass? Then it wouldnt work?