Airport system, Utils class

package AirportPkg;

import java.util.Date;
import java.util.Random;

import AirportPkg.Airplane.AirplaneState;

public class Utils {
    private static Random rnd = new Random();

    // time between two airplanes calls
    private static int minCallTime = 50;
    private static int maxCallTime = 150;

    // time for airplane to land
    private static int minLandTime = 30;
    private static int maxLandTime = 230;

    // time for airplane to take off
    private static int minTakeOffTime = 80;
    private static int maxTakeOffTime = 260;

    // array of final states for an airplane, defined in Airplane.java
    private static AirplaneState[] stateArray = AirplaneState.values();

    // print a log message
    public static void printLog(String tag, String message) {
        System.out.printf("%d : %-6s : %s\n", (new Date()).getTime(), tag,
                message);
    }

    // get random time to the next airplane call
    public static int getNextCallTime() {
        return minCallTime + rnd.nextInt(maxCallTime - minCallTime + 1);
    }

    // get random time for airplane to land
    public static int getLandingTime() {
        return minLandTime + rnd.nextInt(maxLandTime - minLandTime + 1);
    }

    // get random time for airplane to take off
    public static int getTakingOffTime() {
        return minTakeOffTime
                + rnd.nextInt(maxTakeOffTime - minTakeOffTime + 1);
    }

    // get random state for an airplane
    public static AirplaneState getRandomState() {
        return stateArray[rnd.nextInt(stateArray.length)];
    }

}