How to update data in Java program?

Question

Java

Hello.
I'm trying to make a currency converter.
The task is this. You need to take a quote from the web and add it to the program.
When you start the program, the data should be automatically picked up and updated. How to do it?
With SQL or what?

I'm just a beginner, don't judge too harshly. I tried to find the answer, but apparently it is not very possible to formulate the request)

Answer 1

You need to take it the way the service that provides quotes services writes in its documentation. There is no universal approach - each service is developed by different developers and they determine how you can connect to their service to receive data. It can be SOAP, REST API, EJB and many others.
Read about the concept of API in general.