有限ステートマシンの簡単な例

package com.smart.fsm.phonebank;



public class FSM {



    static State[][] transTable=new State[State.values().length][10];

    

    static{

        transTable[State.start.ordinal()][1]=State.chinese;

        transTable[State.start.ordinal()][2]=State.english;

        transTable[State.chinese.ordinal()][0]=State.end;

        transTable[State.english.ordinal()][0]=State.end;

    }

    

    State current=State.start;

    

    State step(State s,char c){

        current=transTable[s.ordinal()][c-'0'];

        return current;

    }

    

    public static void main(String[] args) {

        FSM fsm=new FSM();

        System.out.println(fsm.step(fsm.current,'1'));

        System.out.println(fsm.step(fsm.current,'0'));

    }



}



package com.smart.fsm.phonebank;



public enum State {

    start,

    chinese,

    english,

    end

}