jfreechart example source code file (LineFunction2D.java)

This example jfreechart source code file (LineFunction2D.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

function2d, function2d, linefunction2d, linefunction2d

The jfreechart LineFunction2D.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.]
 *
 * -------------------
 * LineFunction2D.java
 * -------------------
 * (C) Copyright 2002-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes:
 * --------
 * 01-Oct-2002 : Version 1 (DG);
 *
 */

package org.jfree.data.function;

/**
 * A function in the form y = a + bx.
 */
public class LineFunction2D implements Function2D {

    /** The intercept. */
    private double a;

    /** The slope of the line. */
    private double b;

    /**
     * Constructs a new line function.
     *
     * @param a  the intercept.
     * @param b  the slope.
     */
    public LineFunction2D(double a, double b) {
        this.a = a;
        this.b = b;
    }

    /**
     * Returns the function value.
     *
     * @param x  the x-value.
     *
     * @return The value.
     */
    public double getValue(double x) {
        return this.a + this.b * x;
    }

}