Content Comparison

Stateless system

Does not store information about past interactions with the system. So, it’s like the first interaction each time.

class Return{
    String interact(String input) {
        return input; 
    }
}

Other example of stateless system : HTTP (application layer protocol in the TCP/IP model used to transfer information between devices in a network); IP or Internet Protocol (network layer in the TCP/IP model used for sending packets from source to destination).

Statefull system

Stores information about the last interaction and the system may produce different outputs than the previous interactions.

class Counter {
    private int count = 0;

    int count() {
        count++;
        return count;
    }
}