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JFreeChart is a class library, written in Java, for generating charts.
Utilising the Java2D APIs, it currently supports bar charts, pie charts,
line charts, XY-plots and time series plots.
/* ===========================================================
* 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.]
*
* --------------------
* HMSNumberFormat.java
* --------------------
* (C) Copyright 2013, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes:
* --------
* 28-Sep-2013 : Version 1 (RW);
*
*/
package org.jfree.chart.util;
import java.text.DecimalFormat;
import java.text.FieldPosition;
import java.text.NumberFormat;
import java.text.ParsePosition;
/**
* A custom number formatter that formats numbers (in seconds) as HH:MM:SS.
* Created in response to:
*
* http://stackoverflow.com/questions/19028908/jfreechart-need-to-customize-y-axis-just-for-printing
*
* @since 1.0.17
*/
public class HMSNumberFormat extends NumberFormat {
private NumberFormat formatter = new DecimalFormat("00");
/**
* Creates a new instance.
*/
public HMSNumberFormat() {
// nothing to do
}
/**
* Formats the specified number as a string of the form HH:MM:SS. The
* decimal fraction is ignored.
*
* @param number the number to format.
* @param toAppendTo the buffer to append to (ignored here).
* @param pos the field position (ignored here).
*
* @return The string buffer.
*/
@Override
public StringBuffer format(double number, StringBuffer toAppendTo,
FieldPosition pos) {
return format((long) number, toAppendTo, pos);
}
/**
* Formats the specified number as a string of the form HH:MM:SS.
*
* @param number the number to format.
* @param toAppendTo the buffer to append to (ignored here).
* @param pos the field position (ignored here).
*
* @return The string buffer.
*/
@Override
public StringBuffer format(long number, StringBuffer toAppendTo,
FieldPosition pos) {
StringBuffer sb = new StringBuffer();
long hours = number / 3600;
sb.append(this.formatter.format(hours)).append(":");
long remaining = number - (hours * 3600);
long minutes = remaining / 60;
sb.append(this.formatter.format(minutes)).append(":");
long seconds = remaining - (minutes * 60);
sb.append(this.formatter.format(seconds));
return sb;
}
/**
* Parsing is not implemented, so this method always returns
* null.
*
* @param source ignored.
* @param parsePosition ignored.
*
* @return Always null.
*/
@Override
public Number parse (String source, ParsePosition parsePosition) {
return null; // don't bother with parsing
}
}