What is the significance of the synchronized keyword Likewise, entering a synchronized block requires locking the this object of the method When should methods be synchronized
Synchronized Swimmers | Scrolller
This guarantees that changes to the state of the object are visible to all threads have a look at this documentation page to understand intrinsic locks and lock behavior.
3 synchronized has two effects
First, it is not possible for two invocations of synchronized methods on the same object to interleave When one thread is executing a synchronized method for an object, all other threads that invoke synchronized methods for the same object block (suspend execution) until the first thread is done with the object. Tengo que realizar un proyecto en el que se sincronicen 10 hilos, en el cual son hay 5 hilos de ping y 5 hilos de pong Uno debe de imprimir ping, y otro pong y lo deben de imprimir alternadame.
When we use this block, we mean that we are willing to wait until the thread using this monitor, releases it. In order to guarantee serial access, it is critical that all access to the backing list is accomplished through the returned list It is imperative that the user manually synchronize on the returned list when iterating over it. For synchronized methods, the lock will be held throughout the method scope, while in the synchronized block, the lock is held only during that block scope (otherwise known as critical section).
Entering a synchronized block, taking out a lock and reading from a volatile are all considered as an acquire and the release of a lock, exiting a synchronized block and writing a volatile are all forms of a release.
Difference between synchronized block and synchronized method are following Synchronized block reduce scope of lock, but synchronized method's scope of lock is whole method.
