The problem is that you have defined your variable InterfaceSample samp and
initialised it to NULL (InterfaceSample samp=null;). Then you are trying
to use this object which hasn't been created yet!
You probably want:
InterfaceSample samp = new ClassUsingInterfaceSample(); // or whatever to
create the instance of the object
Then you can call samp.getData();
Although I suspect that it will be useless because it hasn't been populated
with anything (unless the constructor has done something).
Where ClassUsingInterfaceSample is defined as:
class ClassUsingInterfaceSample implements InterfaceSample
Hope this helps,
Haydn
"Ramesh
Nuthalapati" To: <[EMAIL PROTECTED]>
<ramnuth@rediffmail cc: <[EMAIL PROTECTED]>
.com> Subject: (ROSE) Interface -
subsystem
Sent by:
owner-rose_forum@ra
tional.com
16/10/2001 11:06
Please respond to
"Ramesh
Nuthalapati"
Hi all
I have an interface. i have implemented this interface in a sub system. so
my class should access the interface methods which are implemented in the
subsystem. when i am trying to call methods
InterfaceSample samp=null;
samp.getData();
when i used this in my class it says "NULL" and is throwing exception.
Please help me in this issue. how do i call methods which are implemeted in
my subsystem through interface.
everything i have kept in a package.
Thanks in advance
Ramesh Nuthalapati.
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