Java tutorial
/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2013, 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. * * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. * Other names may be trademarks of their respective owners.] * * --------- * OHLC.java * --------- * (C) Copyright 2006, 2009, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * Changes * ------- * 04-Dec-2006 : Version 1 (DG); * 23-May-2009 : Implemented hashCode() (DG); * */ package org.jfree.data.time.ohlc; import java.io.Serializable; import org.jfree.chart.HashUtilities; /** * A data record containing open-high-low-close data (immutable). This class * is used internally by the {@link OHLCItem} class. * * @since 1.0.4 */ public class OHLC implements Serializable { /** The open value. */ private double open; /** The close value. */ private double close; /** The high value. */ private double high; /** The low value. */ private double low; /** * Creates a new instance of <code>OHLC</code>. * * @param open the open value. * @param close the close value. * @param high the high value. * @param low the low value. */ public OHLC(double open, double high, double low, double close) { this.open = open; this.close = close; this.high = high; this.low = low; } /** * Returns the open value. * * @return The open value. */ public double getOpen() { return this.open; } /** * Returns the close value. * * @return The close value. */ public double getClose() { return this.close; } /** * Returns the high value. * * @return The high value. */ public double getHigh() { return this.high; } /** * Returns the low value. * * @return The low value. */ public double getLow() { return this.low; } /** * Tests this instance for equality with an arbitrary object. * * @param obj the object (<code>null</code> permitted). * * @return A boolean. */ @Override public boolean equals(Object obj) { if (obj == this) { return true; } if (!(obj instanceof OHLC)) { return false; } OHLC that = (OHLC) obj; if (this.open != that.open) { return false; } if (this.close != that.close) { return false; } if (this.high != that.high) { return false; } if (this.low != that.low) { return false; } return true; } /** * Returns a hash code for this instance. * * @return A hash code. */ @Override public int hashCode() { int result = 193; result = HashUtilities.hashCode(result, this.open); result = HashUtilities.hashCode(result, this.high); result = HashUtilities.hashCode(result, this.low); result = HashUtilities.hashCode(result, this.close); return result; } }