Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...

Can a lock be acquired on a class?

Answer Posted / jamshed katta

A lock can be acquired on a class, you would want to do that if you are using static methods in your class, in which case there would be only one copy, so you would need a lock on the class rather than the instance.
Eg:

public static int getPageHits{ // Not synchronized
return hits;
}


so, now instead of using

public static int getPageHits{
synchronized(this){
return hits;
}
}


you would rather do


public static int getPageHits{

synchronized(ClassName.class){
return hits;
}

}

where ClassName is the name of the class whose lock u are trying to acquire.


you could also use Class.forName("ClassName")

Is This Answer Correct ?    5 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Give the hierarchy of inputstream and outputstream classes.

1048


What happens if we override only equals?

926


How big is a gigabyte?

989


What is difference between overloading and overriding in java?

967


Draw a UML class diagram for the code fragment given below: public class StringApplet extends Applet { private Label sampleString; private Button showTheString; private ButtonHandler bHandler; private FlowLayout layout; public StringApplet() { sampleString = new Label(" "); showTheString = new Button (" Show the String"); bHandler = new ButtonHandler(); layout = new FlowLayout(); showTheString.addActionListener(bHandler); setLayout(layout); add(sampleString); add(showTheString); } class ButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { samplestring.setText("Good Morning"); } } } Note: The methods need not be indicated on the diagram.

1988


How do you define a method?

923


Is an array a vector?

961


Should a main method be compulsorily declared in all java classes?

996


What is JFC?

1159


What is the use of isempty in java?

962


Can we convert integer to string in java?

1006


State the main difference between c++ and java?

1034


What is isa relationship?

963


When does a class need a virtual destructor?

949


What is getkey () in java?

958