Finnish programming the class,

Please write a full answer and give a good explanation.

The following class is intended to implement a communication channel between threads in Java such that multiple threads can concurrently run as producers and other multiple threads can run as consumers. An instance of the class that multiple threads have access to should act as a postbox in which producers can put any integer values and consumers can retrieve these integers. It must be ensured that all integers that are placed in a postbox is retrieved by one and only one consumer. We assume that at least one consumer (thread) regularly tries to retrieve an integer