Object[] params1 = new Object[]{API_KEY, playerName};
String result = (String) client.execute("player.seen", params1);
int timeStamp = Integer.parseInt(result);

Date curDate = new Date();
int TimeStamp_now = (int) curDate.getTime();

float diff = TimeStamp_now - timeStamp;
int seconds = (int) (diff / (1000) % 60);
int minutes = (int) (diff / (60 * 1000) % 60);
int hours =   (int) (diff / (60 * 60 * 1000) % 24);
int days =    (int) (diff / (24 * 60 * 60 * 1000));

System.out.println(days + " days, " + hours + " hours, "  + minutes + " minutes, " + seconds + " seconds.");