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synchronized class

Subbarao Kondabala
Greenhorn

Joined: May 17, 2005
Posts: 27
Hi all,
Java.util.Vector is a synchronized class. I checked the syntax of all methods in Vector class, but no method signature include synchronized keyword.

My question is how can we create a synchronized class?

In synchronized class wheather class is synchronized or both class and all methods are synchronized?

Thanks in advance.
Subbarao


Thanks and Regards,
Subbarao Kondabala
Ilja Preuss
author
Sheriff

Joined: Jul 11, 2001
Posts: 14112
Originally posted by Subbarao Kondabala:
Java.util.Vector is a synchronized class.


The term "synchronized class" actually doesn't really exist. Vector is *thread safe*. There are several ways to make a class thread safe, the synchronized modifier is just one tool in the toolbox to do that.


The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus
Subbarao Kondabala
Greenhorn

Joined: May 17, 2005
Posts: 27
Hi Ilja Preuss,
Can you Please explain different ways for synchroning a class. Can you explain how Vector class made as Synchronized.

Thanks in advance
Subbarao
Ilja Preuss
author
Sheriff

Joined: Jul 11, 2001
Posts: 14112
This really is a topic for a whole book, but techniques to make a class thread safe include using synchronized methods, synchronized blocks and volatile fields. Java 5 also added a lot of additional classes that help with this topic.

If you want to know how it's done in the Vector class, you should probably start by looking at its source code, which comes with the JDK.
 
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subject: synchronized class