Rotates a shape about the specified coordinates. : Transform « 2D Graphics GUI « Java

Rotates a shape about the specified coordinates.

 * JCommon : a free general purpose class library for the Java(tm) platform
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 * Project Info:
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 * This library 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 Lesser General Public
 * License for more details.
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 * -------------------
 * -------------------
 * (C)opyright 2003-2008, by Object Refinery Limited and Contributors.
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 * $Id:,v 1.18 2008/06/02 06:58:28 mungady Exp $
 * Changes
 * -------
 * 13-Aug-2003 : Version 1 (DG);
 * 16-Mar-2004 : Moved rotateShape() from to here (DG);
 * 13-May-2004 : Added new shape creation methods (DG);
 * 30-Sep-2004 : Added createLineRegion() method (DG);
 *               Moved drawRotatedShape() method from RefineryUtilities class
 *               to this class (DG);
 * 04-Oct-2004 : Renamed ShapeUtils --> ShapeUtilities (DG);
 * 26-Oct-2004 : Added a method to test the equality of two Line2D
 *               instances (DG);
 * 10-Nov-2004 : Added new translateShape() and equal(Ellipse2D, Ellipse2D)
 *               methods (DG);
 * 11-Nov-2004 : Renamed translateShape() --> createTranslatedShape() (DG);
 * 07-Jan-2005 : Minor Javadoc fix (DG);
 * 11-Jan-2005 : Removed deprecated code in preparation for 1.0.0 release (DG);
 * 21-Jan-2005 : Modified return type of RectangleAnchor.coordinates()
 *               method (DG);
 * 22-Feb-2005 : Added equality tests for Arc2D and GeneralPath (DG);
 * 16-Mar-2005 : Fixed bug where equal(Shape, Shape) fails for two Polygon
 *               instances (DG);
 * 01-Jun-2008 : Fixed bug in equal(GeneralPath, GeneralPath) method (DG);

import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
 * Utility methods for {@link Shape} objects.
 * @author David Gilbert
public class Main {
   * Rotates a shape about the specified coordinates.
   * @param base  the shape (<code>null</code> permitted, returns
   *              <code>null</code>).
   * @param angle  the angle (in radians).
   * @param x  the x coordinate for the rotation point (in Java2D space).
   * @param y  the y coordinate for the rotation point (in Java2D space).
   * @return the rotated shape.
  public static Shape rotateShape(final Shape base, final double angle,
                                  final float x, final float y) {
      if (base == null) {
          return null;
      final AffineTransform rotate = AffineTransform.getRotateInstance(
              angle, x, y);
      final Shape result = rotate.createTransformedShape(base);
      return result;



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