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jfreechart example source code file (XYCoordinate.java)

This example jfreechart source code file (XYCoordinate.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

comparable, comparable, illegalargumentexception, incomparable, io, serializable, serializable, string, string, xycoordinate, xycoordinate

The jfreechart XYCoordinate.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/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.]
 *
 * -----------------
 * XYCoordinate.java
 * -----------------
 * (C) Copyright 2007, 2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 30-Jan-2007 : Version 1 (DG);
 * 25-May-2007 : Moved from experimental to the main source tree (DG);
 *
 */

package org.jfree.data.xy;

import java.io.Serializable;

/**
 * Represents an (x, y) coordinate.
 *
 * @since 1.0.6
 */
public class XYCoordinate implements Comparable, Serializable {

    /** The x-coordinate. */
    private double x;

    /** The y-coordinate. */
    private double y;

    /**
     * Creates a new coordinate for the point (0.0, 0.0).
     */
    public XYCoordinate() {
        this(0.0, 0.0);
    }

    /**
     * Creates a new coordinate for the point (x, y).
     *
     * @param x  the x-coordinate.
     * @param y  the y-coordinate.
     */
    public XYCoordinate(double x, double y) {
        this.x = x;
        this.y = y;
    }

    /**
     * Returns the x-coordinate.
     *
     * @return The x-coordinate.
     */
    public double getX() {
        return this.x;
    }

    /**
     * Returns the y-coordinate.
     *
     * @return The y-coordinate.
     */
    public double getY() {
        return this.y;
    }

    /**
     * Tests this coordinate for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof XYCoordinate)) {
            return false;
        }
        XYCoordinate that = (XYCoordinate) obj;
        if (this.x != that.x) {
            return false;
        }
        if (this.y != that.y) {
            return false;
        }
        return true;
    }

    /**
     * Returns a hash code for this instance.
     *
     * @return A hash code.
     */
    public int hashCode() {
        int result = 193;
        long temp = Double.doubleToLongBits(this.x);
        result = 37 * result + (int) (temp ^ (temp >>> 32));
        temp = Double.doubleToLongBits(this.y);
        result = 37 * result + (int) (temp ^ (temp >>> 32));
        return result;
    }

    /**
     * Returns a string representation of this instance, primarily for
     * debugging purposes.
     *
     * @return A string.
     */
    public String toString() {
        return "(" + this.x + ", " + this.y + ")";
    }

    /**
     * Compares this instance against an arbitrary object.
     *
     * @param obj  the object (<code>null not permitted).
     *
     * @return An integer indicating the relative order of the items.
     */
    public int compareTo(Object obj) {
        if (!(obj instanceof XYCoordinate)) {
            throw new IllegalArgumentException("Incomparable object.");
        }
        XYCoordinate that = (XYCoordinate) obj;
        if (this.x > that.x) {
            return 1;
        }
        else if (this.x < that.x) {
            return -1;
        }
        else {
            if (this.y > that.y) {
                return 1;
            }
            else if (this.y < that.y) {
                return -1;
            }
        }
        return 0;
    }

}

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