?? city.java
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/* * Encog Neural Network and Bot Library for Java * http://www.heatonresearch.com/encog/ * http://code.google.com/p/encog-java/ * * Copyright 2008, Heaton Research Inc., and individual contributors. * See the copyright.txt in the distribution for a full listing of * individual contributors. * * This 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 software 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 software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */package org.encog.examples.nonlinear.tsp;/** * City: Holds the location of a city for the traveling salesman problem. * * @author Jeff Heaton * @version 2.1 */public class City { /** * The city's x position. */ int xpos; /** * The city's y position. */ int ypos; /** * Constructor. * * @param x * The city's x position * @param y * The city's y position. */ public City(final int x, final int y) { this.xpos = x; this.ypos = y; } /** * Return's the city's x position. * * @return The city's x position. */ int getx() { return this.xpos; } /** * Returns the city's y position. * * @return The city's y position. */ int gety() { return this.ypos; } /** * Returns how close the city is to another city. * * @param cother * The other city. * @return A distance. */ public int proximity(final City cother) { return proximity(cother.getx(), cother.gety()); } /** * Returns how far this city is from a a specific point. This method uses * the pythagorean theorum to calculate the distance. * * @param x * The x coordinate * @param y * The y coordinate * @return The distance. */ int proximity(final int x, final int y) { final int xdiff = this.xpos - x; final int ydiff = this.ypos - y; return (int) Math.sqrt(xdiff * xdiff + ydiff * ydiff); }}
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