Methoden Aufruf:
Timestamp actualTime = new Timestamp(new Date().getTime());
Timestamp enddate = Ban.getBanTimestamp(reason, actualTime);

Methode:
public static Timestamp getBanTimestamp(String reason, Timestamp actualTime){
        Timestamp endTimestamp = actualTime;
        Long endTimeLong = 0L;
        int days = 1;

        switch(reason){
        case "HACK": days = 15;
        break;

        case "AURA" : days = 30;
        break;

        case "FLY": days = 20;
        break;

        case "SPAM": days = 7;
        break;

        case "INSULT": days = 7;
        break;

        case "TROL": days = 3;
        break;

        case "TEAM": days = 3;
        break;

        case "UNKNOWN": days = 7;
        break;
        }

        endTimeLong = endTimestamp.getTime() + (days * 24 * 60 * 60 * 1000);
        endTimestamp.setTime(endTimeLong);

        return endTimestamp;
    }
Am Ende:
actualtimestamp = ca. 19 Tage und 21 Stunden FRÜHER