Source Code Cross Referenced for HistogramBin.java in  » Chart » jfreechart » org » jfree » data » statistics » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Chart » jfreechart » org.jfree.data.statistics 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* ===========================================================
002:         * JFreeChart : a free chart library for the Java(tm) platform
003:         * ===========================================================
004:         *
005:         * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
006:         *
007:         * Project Info:  http://www.jfree.org/jfreechart/index.html
008:         *
009:         * This library is free software; you can redistribute it and/or modify it 
010:         * under the terms of the GNU Lesser General Public License as published by 
011:         * the Free Software Foundation; either version 2.1 of the License, or 
012:         * (at your option) any later version.
013:         *
014:         * This library is distributed in the hope that it will be useful, but 
015:         * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016:         * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017:         * License for more details.
018:         *
019:         * You should have received a copy of the GNU Lesser General Public
020:         * License along with this library; if not, write to the Free Software
021:         * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022:         * USA.  
023:         *
024:         * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025:         * in the United States and other countries.]
026:         *
027:         * -----------------
028:         * HistogramBin.java
029:         * -----------------
030:         * (C) Copyright 2003-2007, by Jelai Wang and Contributors.
031:         *
032:         * Original Author:  Jelai Wang (jelaiw AT mindspring.com);
033:         * Contributor(s):   David Gilbert (for Object Refinery Limited);
034:         *
035:         * $Id: HistogramBin.java,v 1.4.2.3 2007/02/02 15:50:24 mungady Exp $
036:         *
037:         * Changes
038:         * -------
039:         * 06-Jul-2003 : Version 1, contributed by Jelai Wang (DG);
040:         * 07-Jul-2003 : Changed package and added Javadocs (DG);
041:         * 01-Mar-2004 : Moved from org.jfree.data --> org.jfree.data.statistics (DG);
042:         * ------------- JFREECHART 1.0.x ---------------------------------------------
043:         * 02-Feb-2007 : Removed author tags from all over JFreeChart sources (DG);
044:         * 
045:         */
046:
047:        package org.jfree.data.statistics;
048:
049:        import java.io.Serializable;
050:
051:        /**
052:         * A bin for the {@link HistogramDataset} class.
053:         */
054:        public class HistogramBin implements  Cloneable, Serializable {
055:
056:            /** For serialization. */
057:            private static final long serialVersionUID = 7614685080015589931L;
058:
059:            /** The number of items in the bin. */
060:            private int count;
061:
062:            /** The start boundary. */
063:            private double startBoundary;
064:
065:            /** The end boundary. */
066:            private double endBoundary;
067:
068:            /**
069:             * Creates a new bin.
070:             * 
071:             * @param startBoundary  the start boundary.
072:             * @param endBoundary  the end boundary.
073:             */
074:            public HistogramBin(double startBoundary, double endBoundary) {
075:                if (startBoundary > endBoundary) {
076:                    throw new IllegalArgumentException(
077:                            "HistogramBin():  startBoundary > endBoundary.");
078:                }
079:                this .count = 0;
080:                this .startBoundary = startBoundary;
081:                this .endBoundary = endBoundary;
082:            }
083:
084:            /**
085:             * Returns the number of items in the bin.
086:             * 
087:             * @return The item count.
088:             */
089:            public int getCount() {
090:                return this .count;
091:            }
092:
093:            /**
094:             * Increments the item count.
095:             */
096:            public void incrementCount() {
097:                this .count++;
098:            }
099:
100:            /**
101:             * Returns the start boundary.
102:             * 
103:             * @return The start boundary.
104:             */
105:            public double getStartBoundary() {
106:                return this .startBoundary;
107:            }
108:
109:            /**
110:             * Returns the end boundary.
111:             * 
112:             * @return The end boundary.
113:             */
114:            public double getEndBoundary() {
115:                return this .endBoundary;
116:            }
117:
118:            /**
119:             * Returns the bin width.
120:             * 
121:             * @return The bin width.
122:             */
123:            public double getBinWidth() {
124:                return this .endBoundary - this .startBoundary;
125:            }
126:
127:            /**
128:             * Tests this object for equality with an arbitrary object.
129:             * 
130:             * @param obj  the object to test against.
131:             * 
132:             * @return A boolean.
133:             */
134:            public boolean equals(Object obj) {
135:                if (obj == null) {
136:                    return false;
137:                }
138:                if (obj == this ) {
139:                    return true;
140:                }
141:                if (obj instanceof  HistogramBin) {
142:                    HistogramBin bin = (HistogramBin) obj;
143:                    boolean b0 = bin.startBoundary == this .startBoundary;
144:                    boolean b1 = bin.endBoundary == this .endBoundary;
145:                    boolean b2 = bin.count == this .count;
146:                    return b0 && b1 && b2;
147:                }
148:                return false;
149:            }
150:
151:            /**
152:             * Returns a clone of the bin.
153:             * 
154:             * @return A clone.
155:             * 
156:             * @throws CloneNotSupportedException not thrown by this class.
157:             */
158:            public Object clone() throws CloneNotSupportedException {
159:                return super.clone();
160:            }
161:
162:        }
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