[Java] Sending a task to another thread that was started earlier. Is it possible to?

Question

Java

Is it possible to make such a scheme? When the program starts, a second thread is started. Further, during the execution of actions, send some actions to the same second thread.

Answer 1

Maybe

Answer 2

send some actions to the same second thread

some are what? ;) you can pass data there, you can get data from there, you can run an asynchronous task, and so on...
for example, run part of the task as a service... https://developer.android.com/guide/components/services

Answer 3

Looking at classes in java.concurent.util