Producer and consumer instance == Data production additive and data destruction deleter

To avoid this problem, threaded waits should always be used in loops, such as while

Implicit Lock synchronized and display Lock can be used here

Synchronized – > Object. The wait ()/Object. The notify ()/Object. The notifyAll ()

The Lock – > Lock. NewCondition. Await () /. Signal () /. SignalAll ()

Condition is the interface that controls thread communication