в 17:44, 31 мая 2010

2010-05-31T17:44:26Z

Admin: 1 версия

2010-05-31T15:25:14Z

1 версия

Новая страница

== Draw Polygon ==



<source lang="java">
import java.awt.Graphics;
import javax.swing.JComponent;
import javax.swing.JFrame;
class MyCanvas extends JComponent {
public void paint(Graphics g) {
int[] x = new int[]{100,200,300,400};
int[] y = new int[]{400,300,300,100};
g.drawPolygon (x, y, x.length);
}
}
public class DrawPolygon {
public static void main(String[] a) {
JFrame window = new JFrame();
window.setBounds(30, 30, 300, 300);
window.getContentPane().add(new MyCanvas());
window.setVisible(true);
}
}</source>



== Tests two polygons for equality. If both are null this method returns true. ==



<source lang="java">
/*
* JCommon : a free general purpose class library for the Java(tm) platform
*
*
* (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* 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.]
*
* -------------------
* ShapeUtilities.java
* -------------------
* (C)opyright 2003-2008, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: ShapeUtilities.java,v 1.18 2008/06/02 06:58:28 mungady Exp $
*
* Changes
* -------
* 13-Aug-2003 : Version 1 (DG);
* 16-Mar-2004 : Moved rotateShape() from RefineryUtilities.java 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.GeneralPath;
import java.awt.geom.PathIterator;
import java.util.Arrays;
/**
* Utility methods for {@link Shape} objects.
*
* @author David Gilbert
*/
public class Main {
/**
* Tests two polygons for equality. If both are <code>null</code> this
* method returns <code>true</code>.
*
* @param p1 path 1 (<code>null</code> permitted).
* @param p2 path 2 (<code>null</code> permitted).
*
* @return A boolean.
*/
public static boolean equal(final GeneralPath p1, final GeneralPath p2) {
if (p1 == null) {
return (p2 == null);
}
if (p2 == null) {
return false;
}
if (p1.getWindingRule() != p2.getWindingRule()) {
return false;
}
PathIterator iterator1 = p1.getPathIterator(null);
PathIterator iterator2 = p2.getPathIterator(null);
double[] d1 = new double[6];
double[] d2 = new double[6];
boolean done = iterator1.isDone() && iterator2.isDone();
while (!done) {
if (iterator1.isDone() != iterator2.isDone()) {
return false;
}
int seg1 = iterator1.currentSegment(d1);
int seg2 = iterator2.currentSegment(d2);
if (seg1 != seg2) {
return false;
}
if (!Arrays.equals(d1, d2)) {
return false;
}
iterator1.next();
iterator2.next();
done = iterator1.isDone() && iterator2.isDone();
}
return true;
}
}</source>

← Предыдущая	Версия 17:44, 31 мая 2010
(нет различий)

Java Tutorial/2D Graphics/Polygon - История изменений

в 17:44, 31 мая 2010

Admin: 1 версия