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Finite state machine: Difference between revisions
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> quit
</pre>
=={{header|Java}}==
<lang java>import java.util.*;
public class FiniteStateMachine {
private enum State {
Ready(true, "Deposit", "Quit"),
Waiting(true, "Select", "Refund"),
Dispensing(true, "Remove"),
Refunding(false, "Refunding"),
Exiting(false, "Quiting");
State(boolean exp, String... in) {
inputs = Arrays.asList(in);
explicit = exp;
}
State nextState(String input, State current) {
if (inputs.contains(input)) {
return map.getOrDefault(input, current);
}
return current;
}
final List<String> inputs;
final static Map<String, State> map = new HashMap<>();
final boolean explicit;
static {
map.put("Deposit", State.Waiting);
map.put("Quit", State.Exiting);
map.put("Select", State.Dispensing);
map.put("Refund", State.Refunding);
map.put("Remove", State.Ready);
map.put("Refunding", State.Ready);
}
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
State state = State.Ready;
while (state != State.Exiting) {
System.out.println(state.inputs);
if (state.explicit){
System.out.print("> ");
state = state.nextState(sc.nextLine().trim(), state);
} else {
state = state.nextState(state.inputs.get(0), state);
}
}
}
}</lang>
<pre>[Deposit, Quit]
> Deposit
[Select, Refund]
> Refund
[Refunding]
[Deposit, Quit]
> Deposit
[Select, Refund]
> Quit
[Select, Refund]
> Select
[Remove]
> Remove
[Deposit, Quit]
> Quit</pre>
=={{header|Kotlin}}==
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