Synchronous and asynchronous in Java interaction mode

The interaction in Java is divided into two types: synchronous and asynchronous.

1. Synchronous interaction: Refers to send a request, need to wait to return, and then be able to send the next request, there is a wait process;

2. Asynchronous interaction: Refers to send a request, do not need to wait for the return, at any time can send the next request, that is, no wait;

Difference:

One needs to wait, one does not need to wait, and in some cases, our project development will prioritize asynchronous interactions that do not need to wait.

What are the recommended scenarios for synchronizing interactions? such as bank transfer system, database storage operations, etc., will use synchronous interaction, the rest of the priority use of asynchronous interaction;

Synchronous and asynchronous in Java interaction mode