Java Programming - Inner Classes - Discussion
Discussion Forum : Inner Classes - General Questions (Q.No. 7)
7.
public class MyOuter
{
public static class MyInner
{
public static void foo() { }
}
}
Answer: Option
Explanation:
MyInner is a static nested class, so it must be instantiated using the fully-scoped name of MyOuter.MyInner.
Option B is incorrect because it doesn't use the enclosing name in the new.
Option C is incorrect because it uses incorrect syntax. When you instantiate a nested class by invoking new on an instance of the enclosing class, you do not use the enclosing name. The difference between Option A and C is that Option C is calling new on an instance of the enclosing class rather than just new by itself.
Option D is incorrect because it doesn't use the enclosing class name in the variable declaration.
Discussion:
5 comments Page 1 of 1.
Jeeva said:
4 years ago
No, The inner class is static. Static classes cannot be instantiated. That's the definition of something being 'static'.
Kiko said:
9 years ago
Option B is the correct answer. Since static nested class , we can directly create instance for inner class object.
It will be,
MyOuter.MyInner mi=new MyInner();
Above must do.
It will be,
MyOuter.MyInner mi=new MyInner();
Above must do.
Raja said:
10 years ago
So which one is exact answer guys. I'm confused by looking into your responses.
Khizar said:
1 decade ago
Is option A correct. It doesn't have () for myouter.
I think like the correct answer will be:
MyOuter.MyInner m = new MyOuter().MyInner();
I think like the correct answer will be:
MyOuter.MyInner m = new MyOuter().MyInner();
Shahul said:
1 decade ago
Option B is correct, since inner class is static.
Object of inner class is not bounded with object of outer class.
Object of inner class is not bounded with object of outer class.
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