Multithreaded programs often function erratically or produce erroneous values due to the lack of thread synchronization. Synchronization is the act of serializing (or ordering one at a time ...

Synchronized statements To create a synchronized statement, you use the synchronized keyword with an expression that evaluates to an object reference, as in the reverseOrder() method below: ...

Even when a program contains only a single thread running on a single processor, a synchronized method call is still slower than an un-synchronized method call.