How to use

isEmpty

method

in

us.ihmc.robotics.lists.RecyclingArrayList

  @Override
  public boolean isCommandValid()
  {
   return timestamp != -1L && !scan.isEmpty();
  }
}

/**
* Returns the last element of this list.
* If the list is empty, it returns {@code null}.
* @return the last element of this list
*/
public T getLast()
{
 if (isEmpty())
   return null;
 else
   return unsafeGet(size - 1);
}

@Override
public String toString()
{
 if (isEmpty())
   return "Empty list";
 String ret = "";
 for (int i = 0; i < size - 1; i++)
   ret += unsafeGet(i).toString() + "\n";
 ret += unsafeGet(size - 1).toString();
 return ret;
}

if (!requestedFootstepAdjustment.getPredictedContactPoints().isEmpty())

if (footstepData.getPredictedContactPoints().isEmpty())
  contactPoints = null;
else