Calling a web API in Java
Some products need data the program does not hold itself: today's weather, an exchange rate, a place on a map, a list of books. That data lives on someone else's server, and you reach it through a web API. Your program sends a request to a URL, the server sends back the answer as text, and your program reads it. This is the connector pattern, and it is how an IA product brings in live data from outside. The answer...