Design pattern to handle an asynchronous response in Java?

Asynchronous code can always be made synchronous. The simplest/crudest way is to make the async call, then enter a while loop that just sleeps the current thread until the value comes back.

In the main method, you call getResponse and then countDownLatch.await(). Pass a count down latch to the getResponse method and then count down once getResponse the result from getResponse is finished.

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