Class Lock : In java, each and every class has a unique lock usually referred to as a class level lock. These locks are achieved using the keyword ‘static synchronized’ and can be used to make static data thread-safe. It is generally used when one wants to prevent multiple threads from entering a synchronized block.
Example :
public class ClassLevelLockExample
{
public void classLevelLockMethod()
{
synchronized (ClassLevelLockExample.class)
{
//DO your stuff here
}
}
}
Object Lock : In java, each and every object has a unique lock usually referred to as an object-level lock. These locks are achieved using the keyword ‘synchronized’ and can be used to protect non-static data. It is generally used when one wants to synchronize a non-static method or block so that only the thread will be able to execute the code block on a given instance of the class.
Example :
public class ObjectLevelLockExample
{
public void objectLevelLockMethod()
{
synchronized (this)
{
//DO your stuff here
}
}
}
