import java.util.Calendar;
import java.util.Random;
class CommonUtil {
private static Random random = new Random(Calendar.getInstance().getTimeInMillis());
/**
*
* @param count
* @return returns a random number among { 0 to count-1 }
*/
public static short getRandomIndex(short count){
int randomIndex = random.nextInt();
short resultIndex = (short) (randomIndex % count);
if(resultIndex < 0){
resultIndex += count;
}
return resultIndex;
}
}