What follows is the highlighted source code with comments. You can also download this file directly: Path.java.

/* * Copyright (C) 2012 W. Patrick Hooper <wphooper@gmail.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ package path; import number.Complex; /** * A Path is a PolygonalPath so that the curves (Segments) between the vertices * are again paths, which we call sub-paths. * * This interface is able to extend PolygonalPath because PathIterator extends * EdgeIterator. That is, a PathIterator is also an EdgeIterator. So, an * implementation of Path also implements PolygonalPath. * * @author W. Patrick Hooper */ public interface Path { /** * Return the starting point. */ Complex startingPoint(); /** * Return the endpoint. */ Complex endingPoint(); /** * Return an iterator over the sub-paths. */ PathIterator iterator(); }

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