After docker exits a container, how to enter the container again?

Question

I ran docker run -it and installed openjdk, and then I exited. How can I enter the original container again?

Answer 1

docker exec -it {dockerId} /bin/bash

Answer 2

First use docker ps -a to find the corresponding stopped container id, and then use docker start -ia <containerid> to start the container

Answer 3

docker attach your_container_name