Use Command in Java multithreaded systems when work items must cross thread boundaries cleanly, but keep thread safety and retry semantics explicit.
Java’s executors, work queues, and schedulers make Command especially practical in concurrent systems.
A command object can cross thread boundaries cleanly because it packages:
That makes commands good units for ExecutorService, task queues, and delayed execution.
Command does not solve:
Those concerns still belong to the surrounding concurrency design.
Use Command to package work, not to pretend concurrency semantics come for free.