"wait-notify-notifyAll" 연습

In the TransferObject class, arrange calls to the wait/notify/notifyAll methods to ensure the sequential production and consumption of objects. In the run methods of the ConsumerTask and ProducerTask classes, create the necessary synchronized blocks.

Arrange wait and notify methods. Example output: Thread-0 MailServer received: [Person [Thread-1] wrote an email 'AAA'] in 1001 ms.

You are given a standard implementation of the wait-notify pattern. Read about CountDownLatch and use the latch field to rewrite the body of the someMethod method. Remove all unnecessary code from the class.