public void addStrategicTarget(String target){
  if (StringUtil.isNullOrEmpty(target)) {
    return;
  }
  strategicBuildingTargets.add(target);
}

public void addStrategicTarget ( String target ) { if ( StringUtil . isNullOrEmpty ( target ) ) { return ; } strategicBuildingTargets . add ( target ) ; }
adds a target that princess will attempt to move to and attack .
