static method

[Krishna Tota]

Hi,
1)Can we synchronize a static method?if yes what is the effect on multithreading?
2)say,we have
class Abc{
static Myclass myobject=new Myclass();
}
now,if we use synchronized static method to access the myobject using one thread.
Can we use that myobject of that Myclass in another thread cuncarently:

Dont forget the method in Sunchronized.
please explain in brief.
Thanks.

[Seetharaman Venkatasamy]

Originally posted by Krishna Tota:
2)say,we have
class Abc{
static Myclass myobject=new Myclass();
}
now,if we use synchronized static method to access the myobject using one thread.
Can we use that myobject of that Myclass in another thread cuncarently:

myobject is an instance of Abc.so you can access this from different method concurrently. you are talking about myobject only right?

[Shikhar Madhok]

Originally posted by Krishna Tota:
Hi,
1)Can we synchronize a static method?if yes what is the effect on multithreading?
2)say,we have
class Abc{
static Myclass myobject=new Myclass();
}
now,if we use synchronized static method to access the myobject using one thread.
Can we use that myobject of that Myclass in another thread cuncarently:

Dont forget the method in Sunchronized.
please explain in brief.
Thanks.

(My guess)
If the only way to access myobject is through a method which is synchronized, then you will be able to access it only from one thread at a time.
I think a static method can be synchronized as well.

HTH
Shikhar

[Amit Ghorpade]

Can we synchronize a static method?if yes what is the effect on multithreading?

Yes we can synchronize on a static method, the effect is mutual exclusion of threads.Similar to synchronizing on non static methods.

originally posted by seetharaman venkatasamy
myobject is an instance of Abc.

No its not instance of Abc
its instance of Myclass

myobject=new Myclass();

And in both cases it cannot be accessed concurrently by another thread.

Hope this helps

[Seetharaman Venkatasamy]

Originally posted by Amit Ghorpade:

And in both cases it cannot be accessed concurrently by another thread.

Hope this helps

Thanks Amit but myObject(static) is an instance .so it is not synchronized right?so why can not access that concurrently?

please ,can you explain me?

[Amit Ghorpade]

but myObject(static) is an instance .so it is not synchronized right?

Aren't instance accesses synchronized?

[Seetharaman Venkatasamy]

Got it Amit ... Thanks

[Amit Ghorpade]

You are welcome