rail chat bot (Java)

Code:


public class RailChatBot {
    private Hashtable<String,RefreshQ> dic = new Hashtable<>();
    private String context = "default";

    public RailChatBot() {
        this.dic.put(context,new RefreshQ());
    }

    public void setContext(String context) {
        if (context.isEmpty()) {return;}
        this.context = context;
    }
    public String respond(String ear){
        // recommended use of filter for the output results
        if (ear.isEmpty()){return "";}
        if (!dic.containsKey(ear)){
            dic.put(ear,new RefreshQ());
        }
        String temp = dic.get(ear).getRNDElement();
        if (!temp.isEmpty()){context = temp;}
        return temp;
    }
    public void learn(String ear){
        // use per each think cycle
        if (ear.isEmpty()){return;}
        if (!dic.containsKey(ear)){
            dic.put(ear,new RefreshQ());
            dic.get(context).add(ear);
            context = ear;
            return ;
        }
        dic.get(context).add(ear);
        context = ear;
    }
    public String monolog(){
        // succession of outputs without input involved
        return respond(context);
    }
}

main:

Code:

       rcb.learn("i am not your buddy guy");
        rcb.learn("i am not your guy friend");
        rcb.learn("i am not your friend pal");
        rcb.learn("i am not your pal buddy");
        rcb.learn("i am not your buddy guy");
        System.out.println(rcb.respond("i am not your guy friend"));
        System.out.println(rcb.respond("i am not your friend pal"));
        System.out.println(rcb.respond("i am not your buddy guy"));


i am not your friend pal
i am not your pal buddy
i am not your guy friend

feelsehh