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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.

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/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2020, 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.]
 *
 * ---------
 * Axis.java
 * ---------
 * (C) Copyright 2000-2020, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Bill Kelemen;
 *                   Nicolas Brodu;
 *                   Peter Kolb (patches 1934255 and 2603321);
 *                   Andrew Mickish (patch 1870189); 
 *
 */

package org.jfree.chart.axis;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.text.AttributedString;
import java.util.Arrays;
import java.util.EventListener;
import java.util.List;
import java.util.Objects;

import javax.swing.event.EventListenerList;

import org.jfree.chart.entity.AxisEntity;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.event.AxisChangeEvent;
import org.jfree.chart.event.AxisChangeListener;
import org.jfree.chart.plot.Plot;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.text.AttributedStringUtils;
import org.jfree.chart.text.TextUtils;
import org.jfree.chart.ui.RectangleEdge;
import org.jfree.chart.ui.RectangleInsets;
import org.jfree.chart.ui.TextAnchor;
import org.jfree.chart.util.AttrStringUtils;
import org.jfree.chart.util.PaintUtils;
import org.jfree.chart.util.Args;
import org.jfree.chart.util.SerialUtils;

/**
 * The base class for all axes in JFreeChart.  Subclasses are divided into
 * those that display values ({@link ValueAxis}) and those that display
 * categories ({@link CategoryAxis}).
 */
public abstract class Axis implements Cloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = 7719289504573298271L;

    /** The default axis visibility ({@code true}). */
    public static final boolean DEFAULT_AXIS_VISIBLE = true;

    /** The default axis label font ({@code Font("SansSerif", Font.PLAIN, 12)}). */
    public static final Font DEFAULT_AXIS_LABEL_FONT = new Font(
            "SansSerif", Font.PLAIN, 12);

    /** The default axis label paint ({@code Color.BLACK}). */
    public static final Paint DEFAULT_AXIS_LABEL_PAINT = Color.BLACK;

    /** The default axis label insets ({@code RectangleInsets(3.0, 3.0, 3.0, 3.0)}). */
    public static final RectangleInsets DEFAULT_AXIS_LABEL_INSETS
            = new RectangleInsets(3.0, 3.0, 3.0, 3.0);

    /** The default axis line paint ({@code Color.GRAY}). */
    public static final Paint DEFAULT_AXIS_LINE_PAINT = Color.GRAY;

    /** The default axis line stroke ({@code BasicStroke(0.5f)}). */
    public static final Stroke DEFAULT_AXIS_LINE_STROKE = new BasicStroke(0.5f);

    /** The default tick labels visibility ({@code true}). */
    public static final boolean DEFAULT_TICK_LABELS_VISIBLE = true;

    /** The default tick label font ({@code Font("SansSerif", Font.PLAIN, 10)}). */
    public static final Font DEFAULT_TICK_LABEL_FONT = new Font("SansSerif",
            Font.PLAIN, 10);

    /** The default tick label paint ({@code Color.BLACK}). */
    public static final Paint DEFAULT_TICK_LABEL_PAINT = Color.BLACK;

    /** The default tick label insets ({@code RectangleInsets(2.0, 4.0, 2.0, 4.0)}). */
    public static final RectangleInsets DEFAULT_TICK_LABEL_INSETS
            = new RectangleInsets(2.0, 4.0, 2.0, 4.0);

    /** The default tick marks visible ({@code true}). */
    public static final boolean DEFAULT_TICK_MARKS_VISIBLE = true;

    /** The default tick stroke ({@code BasicStroke(0.5f)}). */
    public static final Stroke DEFAULT_TICK_MARK_STROKE = new BasicStroke(0.5f);

    /** The default tick paint ({@code Color.GRAY}). */
    public static final Paint DEFAULT_TICK_MARK_PAINT = Color.GRAY;

    /** The default tick mark inside length ({@code 0.0f}). */
    public static final float DEFAULT_TICK_MARK_INSIDE_LENGTH = 0.0f;

    /** The default tick mark outside length ({@code 2.0f}). */
    public static final float DEFAULT_TICK_MARK_OUTSIDE_LENGTH = 2.0f;

    /** A flag indicating whether or not the axis is visible. */
    private boolean visible;

    /** The label for the axis. */
    private String label;
    
    /** 
     * An attributed label for the axis (overrides label if non-null).
     * We have to use this override method to preserve the API compatibility.
     */
    private transient AttributedString attributedLabel;

    /** The font for displaying the axis label. */
    private Font labelFont;

    /** The paint for drawing the axis label. */
    private transient Paint labelPaint;

    /** The insets for the axis label. */
    private RectangleInsets labelInsets;

    /** The label angle. */
    private double labelAngle;
    
    /** The axis label location (new in 1.0.16). */
    private AxisLabelLocation labelLocation;

    /** A flag that controls whether or not the axis line is visible. */
    private boolean axisLineVisible;

    /** The stroke used for the axis line. */
    private transient Stroke axisLineStroke;

    /** The paint used for the axis line. */
    private transient Paint axisLinePaint;

    /**
     * A flag that indicates whether or not tick labels are visible for the
     * axis.
     */
    private boolean tickLabelsVisible;

    /** The font used to display the tick labels. */
    private Font tickLabelFont;

    /** The color used to display the tick labels. */
    private transient Paint tickLabelPaint;

    /** The blank space around each tick label. */
    private RectangleInsets tickLabelInsets;

    /**
     * A flag that indicates whether or not major tick marks are visible for
     * the axis.
     */
    private boolean tickMarksVisible;

    /**
     * The length of the major tick mark inside the data area (zero
     * permitted).
     */
    private float tickMarkInsideLength;

    /**
     * The length of the major tick mark outside the data area (zero
     * permitted).
     */
    private float tickMarkOutsideLength;

    /**
     * A flag that indicates whether or not minor tick marks are visible for the
     * axis.
     *
     * @since 1.0.12
     */
    private boolean minorTickMarksVisible;

    /**
     * The length of the minor tick mark inside the data area (zero permitted).
     *
     * @since 1.0.12
     */
    private float minorTickMarkInsideLength;

    /**
     * The length of the minor tick mark outside the data area (zero permitted).
     *
     * @since 1.0.12
     */
    private float minorTickMarkOutsideLength;

    /** The stroke used to draw tick marks. */
    private transient Stroke tickMarkStroke;

    /** The paint used to draw tick marks. */
    private transient Paint tickMarkPaint;

    /** The fixed (horizontal or vertical) dimension for the axis. */
    private double fixedDimension;

    /**
     * A reference back to the plot that the axis is assigned to (can be
     * {@code null}).
     */
    private transient Plot plot;

    /** Storage for registered listeners. */
    private transient EventListenerList listenerList;

    /**
     * Constructs an axis with the specific label and default values for other
     * attributes.  
     *
     * @param label  the axis label ({@code null} permitted).
     */
    protected Axis(String label) {

        this.label = label;
        this.visible = DEFAULT_AXIS_VISIBLE;
        this.labelFont = DEFAULT_AXIS_LABEL_FONT;
        this.labelPaint = DEFAULT_AXIS_LABEL_PAINT;
        this.labelInsets = DEFAULT_AXIS_LABEL_INSETS;
        this.labelAngle = 0.0;
        this.labelLocation = AxisLabelLocation.MIDDLE;

        this.axisLineVisible = true;
        this.axisLinePaint = DEFAULT_AXIS_LINE_PAINT;
        this.axisLineStroke = DEFAULT_AXIS_LINE_STROKE;

        this.tickLabelsVisible = DEFAULT_TICK_LABELS_VISIBLE;
        this.tickLabelFont = DEFAULT_TICK_LABEL_FONT;
        this.tickLabelPaint = DEFAULT_TICK_LABEL_PAINT;
        this.tickLabelInsets = DEFAULT_TICK_LABEL_INSETS;

        this.tickMarksVisible = DEFAULT_TICK_MARKS_VISIBLE;
        this.tickMarkStroke = DEFAULT_TICK_MARK_STROKE;
        this.tickMarkPaint = DEFAULT_TICK_MARK_PAINT;
        this.tickMarkInsideLength = DEFAULT_TICK_MARK_INSIDE_LENGTH;
        this.tickMarkOutsideLength = DEFAULT_TICK_MARK_OUTSIDE_LENGTH;

        this.minorTickMarksVisible = false;
        this.minorTickMarkInsideLength = 0.0f;
        this.minorTickMarkOutsideLength = 2.0f;

        this.plot = null;

        this.listenerList = new EventListenerList();
    }

    /**
     * Returns {@code true} if the axis is visible, and
     * {@code false} otherwise.
     *
     * @return A boolean.
     *
     * @see #setVisible(boolean)
     */
    public boolean isVisible() {
        return this.visible;
    }

    /**
     * Sets a flag that controls whether or not the axis is visible and sends
     * an {@link AxisChangeEvent} to all registered listeners.
     *
     * @param flag  the flag.
     *
     * @see #isVisible()
     */
    public void setVisible(boolean flag) {
        if (flag != this.visible) {
            this.visible = flag;
            fireChangeEvent();
        }
    }

    /**
     * Returns the label for the axis.
     *
     * @return The label for the axis ({@code null} possible).
     *
     * @see #getLabelFont()
     * @see #getLabelPaint()
     * @see #setLabel(String)
     */
    public String getLabel() {
        return this.label;
    }

    /**
     * Sets the label for the axis and sends an {@link AxisChangeEvent} to all
     * registered listeners.
     *
     * @param label  the new label ({@code null} permitted).
     *
     * @see #getLabel()
     * @see #setLabelFont(Font)
     * @see #setLabelPaint(Paint)
     */
    public void setLabel(String label) {
        this.label = label;
        fireChangeEvent();
    }

    /**
     * Returns the attributed label (the returned value is a copy, so 
     * modifying it will not impact the state of the axis).  The default value 
     * is {@code null}.
     * 
     * @return The attributed label (possibly {@code null}).
     * 
     * @since 1.0.16
     */
    public AttributedString getAttributedLabel() {
        if (this.attributedLabel != null) {
            return new AttributedString(this.attributedLabel.getIterator());
        } else {
            return null;
        }
    }
    
    /**
     * Sets the attributed label for the axis and sends an 
     * {@link AxisChangeEvent} to all registered listeners.  This is a 
     * convenience method that converts the string into an 
     * {@code AttributedString} using the current font attributes.
     * 
     * @param label  the label ({@code null} permitted).
     * 
     * @since 1.0.16
     */
    public void setAttributedLabel(String label) {
        setAttributedLabel(createAttributedLabel(label));    
    }
    
    /**
     * Sets the attributed label for the axis and sends an 
     * {@link AxisChangeEvent} to all registered listeners.
     * 
     * @param label  the label ({@code null} permitted).
     * 
     * @since 1.0.16
     */
    public void setAttributedLabel(AttributedString label) {
        if (label != null) {
            this.attributedLabel = new AttributedString(label.getIterator());
        } else {
            this.attributedLabel = null;
        }
        fireChangeEvent();
    }
    
    /**
     * Creates and returns an {@code AttributedString} with the specified
     * text and the labelFont and labelPaint applied as attributes.
     * 
     * @param label  the label ({@code null} permitted).
     * 
     * @return An attributed string or {@code null}.
     * 
     * @since 1.0.16
     */
    public AttributedString createAttributedLabel(String label) {
        if (label == null) {
            return null;
        }
        AttributedString s = new AttributedString(label);
        s.addAttributes(this.labelFont.getAttributes(), 0, label.length());
        return s;
    }
    
    /**
     * Returns the font for the axis label.
     *
     * @return The font (never {@code null}).
     *
     * @see #setLabelFont(Font)
     */
    public Font getLabelFont() {
        return this.labelFont;
    }

    /**
     * Sets the font for the axis label and sends an {@link AxisChangeEvent}
     * to all registered listeners.
     *
     * @param font  the font ({@code null} not permitted).
     *
     * @see #getLabelFont()
     */
    public void setLabelFont(Font font) {
        Args.nullNotPermitted(font, "font");
        if (!this.labelFont.equals(font)) {
            this.labelFont = font;
            fireChangeEvent();
        }
    }

    /**
     * Returns the color/shade used to draw the axis label.
     *
     * @return The paint (never {@code null}).
     *
     * @see #setLabelPaint(Paint)
     */
    public Paint getLabelPaint() {
        return this.labelPaint;
    }

    /**
     * Sets the paint used to draw the axis label and sends an
     * {@link AxisChangeEvent} to all registered listeners.
     *
     * @param paint  the paint ({@code null} not permitted).
     *
     * @see #getLabelPaint()
     */
    public void setLabelPaint(Paint paint) {
        Args.nullNotPermitted(paint, "paint");
        this.labelPaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the insets for the label (that is, the amount of blank space
     * that should be left around the label).
     *
     * @return The label insets (never {@code null}).
     *
     * @see #setLabelInsets(RectangleInsets)
     */
    public RectangleInsets getLabelInsets() {
        return this.labelInsets;
    }

    /**
     * Sets the insets for the axis label, and sends an {@link AxisChangeEvent}
     * to all registered listeners.
     *
     * @param insets  the insets ({@code null} not permitted).
     *
     * @see #getLabelInsets()
     */
    public void setLabelInsets(RectangleInsets insets) {
        setLabelInsets(insets, true);
    }

    /**
     * Sets the insets for the axis label, and sends an {@link AxisChangeEvent}
     * to all registered listeners.
     *
     * @param insets  the insets ({@code null} not permitted).
     * @param notify  notify listeners?
     *
     * @since 1.0.10
     */
    public void setLabelInsets(RectangleInsets insets, boolean notify) {
        Args.nullNotPermitted(insets, "insets");
        if (!insets.equals(this.labelInsets)) {
            this.labelInsets = insets;
            if (notify) {
                fireChangeEvent();
            }
        }
    }

    /**
     * Returns the angle of the axis label.
     *
     * @return The angle (in radians).
     *
     * @see #setLabelAngle(double)
     */
    public double getLabelAngle() {
        return this.labelAngle;
    }

    /**
     * Sets the angle for the label and sends an {@link AxisChangeEvent} to all
     * registered listeners.
     *
     * @param angle  the angle (in radians).
     *
     * @see #getLabelAngle()
     */
    public void setLabelAngle(double angle) {
        this.labelAngle = angle;
        fireChangeEvent();
    }
    
    /**
     * Returns the location of the axis label.  The default is
     * {@link AxisLabelLocation#MIDDLE}.
     * 
     * @return The location of the axis label (never {@code null}). 
     * 
     * @since 1.0.16
     */
    public AxisLabelLocation getLabelLocation() {
        return this.labelLocation;
    }
    
    /**
     * Sets the axis label location and sends an {@link AxisChangeEvent} to
     * all registered listeners.
     * 
     * @param location  the new location ({@code null} not permitted).
     * 
     * @since 1.0.16
     */
    public void setLabelLocation(AxisLabelLocation location) {
        Args.nullNotPermitted(location, "location");
        this.labelLocation = location;
        fireChangeEvent();
    }

    /**
     * A flag that controls whether or not the axis line is drawn.
     *
     * @return A boolean.
     *
     * @see #getAxisLinePaint()
     * @see #getAxisLineStroke()
     * @see #setAxisLineVisible(boolean)
     */
    public boolean isAxisLineVisible() {
        return this.axisLineVisible;
    }

    /**
     * Sets a flag that controls whether or not the axis line is visible and
     * sends an {@link AxisChangeEvent} to all registered listeners.
     *
     * @param visible  the flag.
     *
     * @see #isAxisLineVisible()
     * @see #setAxisLinePaint(Paint)
     * @see #setAxisLineStroke(Stroke)
     */
    public void setAxisLineVisible(boolean visible) {
        this.axisLineVisible = visible;
        fireChangeEvent();
    }

    /**
     * Returns the paint used to draw the axis line.
     *
     * @return The paint (never {@code null}).
     *
     * @see #setAxisLinePaint(Paint)
     */
    public Paint getAxisLinePaint() {
        return this.axisLinePaint;
    }

    /**
     * Sets the paint used to draw the axis line and sends an
     * {@link AxisChangeEvent} to all registered listeners.
     *
     * @param paint  the paint ({@code null} not permitted).
     *
     * @see #getAxisLinePaint()
     */
    public void setAxisLinePaint(Paint paint) {
        Args.nullNotPermitted(paint, "paint");
        this.axisLinePaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the stroke used to draw the axis line.
     *
     * @return The stroke (never {@code null}).
     *
     * @see #setAxisLineStroke(Stroke)
     */
    public Stroke getAxisLineStroke() {
        return this.axisLineStroke;
    }

    /**
     * Sets the stroke used to draw the axis line and sends an
     * {@link AxisChangeEvent} to all registered listeners.
     *
     * @param stroke  the stroke ({@code null} not permitted).
     *
     * @see #getAxisLineStroke()
     */
    public void setAxisLineStroke(Stroke stroke) {
        Args.nullNotPermitted(stroke, "stroke");
        this.axisLineStroke = stroke;
        fireChangeEvent();
    }

    /**
     * Returns a flag indicating whether or not the tick labels are visible.
     *
     * @return The flag.
     *
     * @see #getTickLabelFont()
     * @see #getTickLabelPaint()
     * @see #setTickLabelsVisible(boolean)
     */
    public boolean isTickLabelsVisible() {
        return this.tickLabelsVisible;
    }

    /**
     * Sets the flag that determines whether or not the tick labels are
     * visible and sends an {@link AxisChangeEvent} to all registered
     * listeners.
     *
     * @param flag  the flag.
     *
     * @see #isTickLabelsVisible()
     * @see #setTickLabelFont(Font)
     * @see #setTickLabelPaint(Paint)
     */
    public void setTickLabelsVisible(boolean flag) {

        if (flag != this.tickLabelsVisible) {
            this.tickLabelsVisible = flag;
            fireChangeEvent();
        }

    }

    /**
     * Returns the flag that indicates whether or not the minor tick marks are
     * showing.
     *
     * @return The flag that indicates whether or not the minor tick marks are
     *         showing.
     *
     * @see #setMinorTickMarksVisible(boolean)
     *
     * @since 1.0.12
     */
    public boolean isMinorTickMarksVisible() {
        return this.minorTickMarksVisible;
    }

    /**
     * Sets the flag that indicates whether or not the minor tick marks are 
     * showing and sends an {@link AxisChangeEvent} to all registered
     * listeners.
     *
     * @param flag  the flag.
     *
     * @see #isMinorTickMarksVisible()
     *
     * @since 1.0.12
     */
    public void setMinorTickMarksVisible(boolean flag) {
        if (flag != this.minorTickMarksVisible) {
            this.minorTickMarksVisible = flag;
            fireChangeEvent();
        }
    }

    /**
     * Returns the font used for the tick labels (if showing).
     *
     * @return The font (never {@code null}).
     *
     * @see #setTickLabelFont(Font)
     */
    public Font getTickLabelFont() {
        return this.tickLabelFont;
    }

    /**
     * Sets the font for the tick labels and sends an {@link AxisChangeEvent}
     * to all registered listeners.
     *
     * @param font  the font ({@code null} not allowed).
     *
     * @see #getTickLabelFont()
     */
    public void setTickLabelFont(Font font) {
        Args.nullNotPermitted(font, "font");
        if (!this.tickLabelFont.equals(font)) {
            this.tickLabelFont = font;
            fireChangeEvent();
        }
    }

    /**
     * Returns the color/shade used for the tick labels.
     *
     * @return The paint used for the tick labels.
     *
     * @see #setTickLabelPaint(Paint)
     */
    public Paint getTickLabelPaint() {
        return this.tickLabelPaint;
    }

    /**
     * Sets the paint used to draw tick labels (if they are showing) and
     * sends an {@link AxisChangeEvent} to all registered listeners.
     *
     * @param paint  the paint ({@code null} not permitted).
     *
     * @see #getTickLabelPaint()
     */
    public void setTickLabelPaint(Paint paint) {
        Args.nullNotPermitted(paint, "paint");
        this.tickLabelPaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the insets for the tick labels.
     *
     * @return The insets (never {@code null}).
     *
     * @see #setTickLabelInsets(RectangleInsets)
     */
    public RectangleInsets getTickLabelInsets() {
        return this.tickLabelInsets;
    }

    /**
     * Sets the insets for the tick labels and sends an {@link AxisChangeEvent}
     * to all registered listeners.
     *
     * @param insets  the insets ({@code null} not permitted).
     *
     * @see #getTickLabelInsets()
     */
    public void setTickLabelInsets(RectangleInsets insets) {
        Args.nullNotPermitted(insets, "insets");
        if (!this.tickLabelInsets.equals(insets)) {
            this.tickLabelInsets = insets;
            fireChangeEvent();
        }
    }

    /**
     * Returns the flag that indicates whether or not the tick marks are
     * showing.
     *
     * @return The flag that indicates whether or not the tick marks are
     *         showing.
     *
     * @see #setTickMarksVisible(boolean)
     */
    public boolean isTickMarksVisible() {
        return this.tickMarksVisible;
    }

    /**
     * Sets the flag that indicates whether or not the tick marks are showing
     * and sends an {@link AxisChangeEvent} to all registered listeners.
     *
     * @param flag  the flag.
     *
     * @see #isTickMarksVisible()
     */
    public void setTickMarksVisible(boolean flag) {
        if (flag != this.tickMarksVisible) {
            this.tickMarksVisible = flag;
            fireChangeEvent();
        }
    }

    /**
     * Returns the inside length of the tick marks.
     *
     * @return The length.
     *
     * @see #getTickMarkOutsideLength()
     * @see #setTickMarkInsideLength(float)
     */
    public float getTickMarkInsideLength() {
        return this.tickMarkInsideLength;
    }

    /**
     * Sets the inside length of the tick marks and sends
     * an {@link AxisChangeEvent} to all registered listeners.
     *
     * @param length  the new length.
     *
     * @see #getTickMarkInsideLength()
     */
    public void setTickMarkInsideLength(float length) {
        this.tickMarkInsideLength = length;
        fireChangeEvent();
    }

    /**
     * Returns the outside length of the tick marks.
     *
     * @return The length.
     *
     * @see #getTickMarkInsideLength()
     * @see #setTickMarkOutsideLength(float)
     */
    public float getTickMarkOutsideLength() {
        return this.tickMarkOutsideLength;
    }

    /**
     * Sets the outside length of the tick marks and sends
     * an {@link AxisChangeEvent} to all registered listeners.
     *
     * @param length  the new length.
     *
     * @see #getTickMarkInsideLength()
     */
    public void setTickMarkOutsideLength(float length) {
        this.tickMarkOutsideLength = length;
        fireChangeEvent();
    }

    /**
     * Returns the stroke used to draw tick marks.
     *
     * @return The stroke (never {@code null}).
     *
     * @see #setTickMarkStroke(Stroke)
     */
    public Stroke getTickMarkStroke() {
        return this.tickMarkStroke;
    }

    /**
     * Sets the stroke used to draw tick marks and sends
     * an {@link AxisChangeEvent} to all registered listeners.
     *
     * @param stroke  the stroke ({@code null} not permitted).
     *
     * @see #getTickMarkStroke()
     */
    public void setTickMarkStroke(Stroke stroke) {
        Args.nullNotPermitted(stroke, "stroke");
        if (!this.tickMarkStroke.equals(stroke)) {
            this.tickMarkStroke = stroke;
            fireChangeEvent();
        }
    }

    /**
     * Returns the paint used to draw tick marks (if they are showing).
     *
     * @return The paint (never {@code null}).
     *
     * @see #setTickMarkPaint(Paint)
     */
    public Paint getTickMarkPaint() {
        return this.tickMarkPaint;
    }

    /**
     * Sets the paint used to draw tick marks and sends an
     * {@link AxisChangeEvent} to all registered listeners.
     *
     * @param paint  the paint ({@code null} not permitted).
     *
     * @see #getTickMarkPaint()
     */
    public void setTickMarkPaint(Paint paint) {
        Args.nullNotPermitted(paint, "paint");
        this.tickMarkPaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the inside length of the minor tick marks.
     *
     * @return The length.
     *
     * @see #getMinorTickMarkOutsideLength()
     * @see #setMinorTickMarkInsideLength(float)
     *
     * @since 1.0.12
     */
    public float getMinorTickMarkInsideLength() {
        return this.minorTickMarkInsideLength;
    }

    /**
     * Sets the inside length of the minor tick marks and sends
     * an {@link AxisChangeEvent} to all registered listeners.
     *
     * @param length  the new length.
     *
     * @see #getMinorTickMarkInsideLength()
     *
     * @since 1.0.12
     */
    public void setMinorTickMarkInsideLength(float length) {
        this.minorTickMarkInsideLength = length;
        fireChangeEvent();
    }

    /**
     * Returns the outside length of the minor tick marks.
     *
     * @return The length.
     *
     * @see #getMinorTickMarkInsideLength()
     * @see #setMinorTickMarkOutsideLength(float)
     *
     * @since 1.0.12
     */
    public float getMinorTickMarkOutsideLength() {
        return this.minorTickMarkOutsideLength;
    }

    /**
     * Sets the outside length of the minor tick marks and sends
     * an {@link AxisChangeEvent} to all registered listeners.
     *
     * @param length  the new length.
     *
     * @see #getMinorTickMarkInsideLength()
     *
     * @since 1.0.12
     */
    public void setMinorTickMarkOutsideLength(float length) {
        this.minorTickMarkOutsideLength = length;
        fireChangeEvent();
    }

    /**
     * Returns the plot that the axis is assigned to.  This method will return
     * {@code null} if the axis is not currently assigned to a plot.
     *
     * @return The plot that the axis is assigned to (possibly {@code null}).
     *
     * @see #setPlot(Plot)
     */
    public Plot getPlot() {
        return this.plot;
    }

    /**
     * Sets a reference to the plot that the axis is assigned to.
     * 

* This method is used internally, you shouldn't need to call it yourself. * * @param plot the plot. * * @see #getPlot() */ public void setPlot(Plot plot) { this.plot = plot; configure(); } /** * Returns the fixed dimension for the axis. * * @return The fixed dimension. * * @see #setFixedDimension(double) */ public double getFixedDimension() { return this.fixedDimension; } /** * Sets the fixed dimension for the axis. *

* This is used when combining more than one plot on a chart. In this case, * there may be several axes that need to have the same height or width so * that they are aligned. This method is used to fix a dimension for the * axis (the context determines whether the dimension is horizontal or * vertical). * * @param dimension the fixed dimension. * * @see #getFixedDimension() */ public void setFixedDimension(double dimension) { this.fixedDimension = dimension; } /** * Configures the axis to work with the current plot. Override this method * to perform any special processing (such as auto-rescaling). */ public abstract void configure(); /** * Estimates the space (height or width) required to draw the axis. * * @param g2 the graphics device. * @param plot the plot that the axis belongs to. * @param plotArea the area within which the plot (including axes) should * be drawn. * @param edge the axis location. * @param space space already reserved. * * @return The space required to draw the axis (including pre-reserved * space). */ public abstract AxisSpace reserveSpace(Graphics2D g2, Plot plot, Rectangle2D plotArea, RectangleEdge edge, AxisSpace space); /** * Draws the axis on a Java 2D graphics device (such as the screen or a * printer). * * @param g2 the graphics device ({@code null} not permitted). * @param cursor the cursor location (determines where to draw the axis). * @param plotArea the area within which the axes and plot should be drawn. * @param dataArea the area within which the data should be drawn. * @param edge the axis location ({@code null} not permitted). * @param plotState collects information about the plot * ({@code null} permitted). * * @return The axis state (never {@code null}). */ public abstract AxisState draw(Graphics2D g2, double cursor, Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge, PlotRenderingInfo plotState); /** * Calculates the positions of the ticks for the axis, storing the results * in the tick list (ready for drawing). * * @param g2 the graphics device. * @param state the axis state. * @param dataArea the area inside the axes. * @param edge the edge on which the axis is located. * * @return The list of ticks. */ public abstract List refreshTicks(Graphics2D g2, AxisState state, Rectangle2D dataArea, RectangleEdge edge); /** * Creates an entity for the axis and adds it to the rendering info. * If {@code plotState} is {@code null}, this means that rendering info * is not being collected so this method simply returns without doing * anything. * * @param cursor the initial cursor value. * @param state the axis state after completion of the drawing with a * possibly updated cursor position. * @param dataArea the data area. * @param edge the edge ({@code null} not permitted). * @param plotState the PlotRenderingInfo from which a reference to the * entity collection can be obtained ({@code null} permitted). * * @since 1.0.13 */ protected void createAndAddEntity(double cursor, AxisState state, Rectangle2D dataArea, RectangleEdge edge, PlotRenderingInfo plotState) { Args.nullNotPermitted(edge, "edge"); if (plotState == null || plotState.getOwner() == null) { return; // no need to create entity if we can't save it anyways... } Rectangle2D hotspot = null; if (edge.equals(RectangleEdge.TOP)) { hotspot = new Rectangle2D.Double(dataArea.getX(), state.getCursor(), dataArea.getWidth(), cursor - state.getCursor()); } else if (edge.equals(RectangleEdge.BOTTOM)) { hotspot = new Rectangle2D.Double(dataArea.getX(), cursor, dataArea.getWidth(), state.getCursor() - cursor); } else if (edge.equals(RectangleEdge.LEFT)) { hotspot = new Rectangle2D.Double(state.getCursor(), dataArea.getY(), cursor - state.getCursor(), dataArea.getHeight()); } else if (edge.equals(RectangleEdge.RIGHT)) { hotspot = new Rectangle2D.Double(cursor, dataArea.getY(), state.getCursor() - cursor, dataArea.getHeight()); } EntityCollection e = plotState.getOwner().getEntityCollection(); if (e != null) { e.add(new AxisEntity(hotspot, this)); } } /** * Registers an object for notification of changes to the axis. * * @param listener the object that is being registered. * * @see #removeChangeListener(AxisChangeListener) */ public void addChangeListener(AxisChangeListener listener) { this.listenerList.add(AxisChangeListener.class, listener); } /** * Deregisters an object for notification of changes to the axis. * * @param listener the object to deregister. * * @see #addChangeListener(AxisChangeListener) */ public void removeChangeListener(AxisChangeListener listener) { this.listenerList.remove(AxisChangeListener.class, listener); } /** * Returns {@code true} if the specified object is registered with * the dataset as a listener. Most applications won't need to call this * method, it exists mainly for use by unit testing code. * * @param listener the listener. * * @return A boolean. */ public boolean hasListener(EventListener listener) { List list = Arrays.asList(this.listenerList.getListenerList()); return list.contains(listener); } /** * Notifies all registered listeners that the axis has changed. * The AxisChangeEvent provides information about the change. * * @param event information about the change to the axis. */ protected void notifyListeners(AxisChangeEvent event) { Object[] listeners = this.listenerList.getListenerList(); for (int i = listeners.length - 2; i >= 0; i -= 2) { if (listeners[i] == AxisChangeListener.class) { ((AxisChangeListener) listeners[i + 1]).axisChanged(event); } } } /** * Sends an {@link AxisChangeEvent} to all registered listeners. * * @since 1.0.12 */ protected void fireChangeEvent() { notifyListeners(new AxisChangeEvent(this)); } /** * Returns a rectangle that encloses the axis label. This is typically * used for layout purposes (it gives the maximum dimensions of the label). * * @param g2 the graphics device. * @param edge the edge of the plot area along which the axis is measuring. * * @return The enclosing rectangle. */ protected Rectangle2D getLabelEnclosure(Graphics2D g2, RectangleEdge edge) { Rectangle2D result = new Rectangle2D.Double(); Rectangle2D bounds = null; if (this.attributedLabel != null) { TextLayout layout = new TextLayout( this.attributedLabel.getIterator(), g2.getFontRenderContext()); bounds = layout.getBounds(); } else { String axisLabel = getLabel(); if (axisLabel != null && !axisLabel.equals("")) { FontMetrics fm = g2.getFontMetrics(getLabelFont()); bounds = TextUtils.getTextBounds(axisLabel, g2, fm); } } if (bounds != null) { RectangleInsets insets = getLabelInsets(); bounds = insets.createOutsetRectangle(bounds); double angle = getLabelAngle(); if (edge == RectangleEdge.LEFT || edge == RectangleEdge.RIGHT) { angle = angle - Math.PI / 2.0; } double x = bounds.getCenterX(); double y = bounds.getCenterY(); AffineTransform transformer = AffineTransform.getRotateInstance(angle, x, y); Shape labelBounds = transformer.createTransformedShape(bounds); result = labelBounds.getBounds2D(); } return result; } /** * Returns the x-coordinate for the point to which the axis label should * be aligned. * * @param location the axis label location ({@code null} not permitted). * @param dataArea the display area in which the data will be rendered ({@code null} not permitted). * * @return The x-coordinate. */ protected double labelLocationX(AxisLabelLocation location, Rectangle2D dataArea) { if (location.equals(AxisLabelLocation.HIGH_END)) { return dataArea.getMaxX(); } if (location.equals(AxisLabelLocation.MIDDLE)) { return dataArea.getCenterX(); } if (location.equals(AxisLabelLocation.LOW_END)) { return dataArea.getMinX(); } throw new RuntimeException("Unexpected AxisLabelLocation: " + location); } /** * Returns the y-coordinate for the point to which the axis label should * be aligned. * * @param location the location ({@code null} not permitted). * @param dataArea the data area ({@code null} not permitted). * * @return The y-coordinate. */ protected double labelLocationY(AxisLabelLocation location, Rectangle2D dataArea) { if (location.equals(AxisLabelLocation.HIGH_END)) { return dataArea.getMinY(); } if (location.equals(AxisLabelLocation.MIDDLE)) { return dataArea.getCenterY(); } if (location.equals(AxisLabelLocation.LOW_END)) { return dataArea.getMaxY(); } throw new RuntimeException("Unexpected AxisLabelLocation: " + location); } /** * Returns the appropriate horizontal text anchor for the specified axis * location. * * @param location the location ({@code null} not permitted). * * @return The text anchor (never {@code null}). */ protected TextAnchor labelAnchorH(AxisLabelLocation location) { if (location.equals(AxisLabelLocation.HIGH_END)) { return TextAnchor.CENTER_RIGHT; } if (location.equals(AxisLabelLocation.MIDDLE)) { return TextAnchor.CENTER; } if (location.equals(AxisLabelLocation.LOW_END)) { return TextAnchor.CENTER_LEFT; } throw new RuntimeException("Unexpected AxisLabelLocation: " + location); } /** * Returns the appropriate vertical text anchor for the specified axis * location. * * @param location the location ({@code null} not permitted). * * @return The text anchor (never {@code null}). */ protected TextAnchor labelAnchorV(AxisLabelLocation location) { if (location.equals(AxisLabelLocation.HIGH_END)) { return TextAnchor.CENTER_RIGHT; } if (location.equals(AxisLabelLocation.MIDDLE)) { return TextAnchor.CENTER; } if (location.equals(AxisLabelLocation.LOW_END)) { return TextAnchor.CENTER_LEFT; } throw new RuntimeException("Unexpected AxisLabelLocation: " + location); } /** * Draws the axis label. * * @param label the label text. * @param g2 the graphics device. * @param plotArea the plot area. * @param dataArea the area inside the axes. * @param edge the location of the axis. * @param state the axis state ({@code null} not permitted). * * @return Information about the axis. */ protected AxisState drawLabel(String label, Graphics2D g2, Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge, AxisState state) { // it is unlikely that 'state' will be null, but check anyway... Args.nullNotPermitted(state, "state"); if ((label == null) || (label.equals(""))) { return state; } Font font = getLabelFont(); RectangleInsets insets = getLabelInsets(); g2.setFont(font); g2.setPaint(getLabelPaint()); FontMetrics fm = g2.getFontMetrics(); Rectangle2D labelBounds = TextUtils.getTextBounds(label, g2, fm); if (edge == RectangleEdge.TOP) { AffineTransform t = AffineTransform.getRotateInstance( getLabelAngle(), labelBounds.getCenterX(), labelBounds.getCenterY()); Shape rotatedLabelBounds = t.createTransformedShape(labelBounds); labelBounds = rotatedLabelBounds.getBounds2D(); double labelx = labelLocationX(this.labelLocation, dataArea); double labely = state.getCursor() - insets.getBottom() - labelBounds.getHeight() / 2.0; TextAnchor anchor = labelAnchorH(this.labelLocation); TextUtils.drawRotatedString(label, g2, (float) labelx, (float) labely, anchor, getLabelAngle(), TextAnchor.CENTER); state.cursorUp(insets.getTop() + labelBounds.getHeight() + insets.getBottom()); } else if (edge == RectangleEdge.BOTTOM) { AffineTransform t = AffineTransform.getRotateInstance( getLabelAngle(), labelBounds.getCenterX(), labelBounds.getCenterY()); Shape rotatedLabelBounds = t.createTransformedShape(labelBounds); labelBounds = rotatedLabelBounds.getBounds2D(); double labelx = labelLocationX(this.labelLocation, dataArea); double labely = state.getCursor() + insets.getTop() + labelBounds.getHeight() / 2.0; TextAnchor anchor = labelAnchorH(this.labelLocation); TextUtils.drawRotatedString(label, g2, (float) labelx, (float) labely, anchor, getLabelAngle(), TextAnchor.CENTER); state.cursorDown(insets.getTop() + labelBounds.getHeight() + insets.getBottom()); } else if (edge == RectangleEdge.LEFT) { AffineTransform t = AffineTransform.getRotateInstance( getLabelAngle() - Math.PI / 2.0, labelBounds.getCenterX(), labelBounds.getCenterY()); Shape rotatedLabelBounds = t.createTransformedShape(labelBounds); labelBounds = rotatedLabelBounds.getBounds2D(); double labelx = state.getCursor() - insets.getRight() - labelBounds.getWidth() / 2.0; double labely = labelLocationY(this.labelLocation, dataArea); TextAnchor anchor = labelAnchorV(this.labelLocation); TextUtils.drawRotatedString(label, g2, (float) labelx, (float) labely, anchor, getLabelAngle() - Math.PI / 2.0, anchor); state.cursorLeft(insets.getLeft() + labelBounds.getWidth() + insets.getRight()); } else if (edge == RectangleEdge.RIGHT) { AffineTransform t = AffineTransform.getRotateInstance( getLabelAngle() + Math.PI / 2.0, labelBounds.getCenterX(), labelBounds.getCenterY()); Shape rotatedLabelBounds = t.createTransformedShape(labelBounds); labelBounds = rotatedLabelBounds.getBounds2D(); double labelx = state.getCursor() + insets.getLeft() + labelBounds.getWidth() / 2.0; double labely = labelLocationY(this.labelLocation, dataArea); TextAnchor anchor = labelAnchorV(this.labelLocation); TextUtils.drawRotatedString(label, g2, (float) labelx, (float) labely, anchor, getLabelAngle() + Math.PI / 2.0, anchor); state.cursorRight(insets.getLeft() + labelBounds.getWidth() + insets.getRight()); } return state; } /** * Draws the axis label. * * @param label the label text. * @param g2 the graphics device. * @param plotArea the plot area. * @param dataArea the area inside the axes. * @param edge the location of the axis. * @param state the axis state ({@code null} not permitted). * * @return Information about the axis. * * @since 1.0.16 */ protected AxisState drawAttributedLabel(AttributedString label, Graphics2D g2, Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge, AxisState state) { // it is unlikely that 'state' will be null, but check anyway... Args.nullNotPermitted(state, "state"); if (label == null) { return state; } RectangleInsets insets = getLabelInsets(); g2.setFont(getLabelFont()); g2.setPaint(getLabelPaint()); TextLayout layout = new TextLayout(this.attributedLabel.getIterator(), g2.getFontRenderContext()); Rectangle2D labelBounds = layout.getBounds(); if (edge == RectangleEdge.TOP) { AffineTransform t = AffineTransform.getRotateInstance( getLabelAngle(), labelBounds.getCenterX(), labelBounds.getCenterY()); Shape rotatedLabelBounds = t.createTransformedShape(labelBounds); labelBounds = rotatedLabelBounds.getBounds2D(); double labelx = labelLocationX(this.labelLocation, dataArea); double labely = state.getCursor() - insets.getBottom() - labelBounds.getHeight() / 2.0; TextAnchor anchor = labelAnchorH(this.labelLocation); AttrStringUtils.drawRotatedString(label, g2, (float) labelx, (float) labely, anchor, getLabelAngle(), TextAnchor.CENTER); state.cursorUp(insets.getTop() + labelBounds.getHeight() + insets.getBottom()); } else if (edge == RectangleEdge.BOTTOM) { AffineTransform t = AffineTransform.getRotateInstance( getLabelAngle(), labelBounds.getCenterX(), labelBounds.getCenterY()); Shape rotatedLabelBounds = t.createTransformedShape(labelBounds); labelBounds = rotatedLabelBounds.getBounds2D(); double labelx = labelLocationX(this.labelLocation, dataArea); double labely = state.getCursor() + insets.getTop() + labelBounds.getHeight() / 2.0; TextAnchor anchor = labelAnchorH(this.labelLocation); AttrStringUtils.drawRotatedString(label, g2, (float) labelx, (float) labely, anchor, getLabelAngle(), TextAnchor.CENTER); state.cursorDown(insets.getTop() + labelBounds.getHeight() + insets.getBottom()); } else if (edge == RectangleEdge.LEFT) { AffineTransform t = AffineTransform.getRotateInstance( getLabelAngle() - Math.PI / 2.0, labelBounds.getCenterX(), labelBounds.getCenterY()); Shape rotatedLabelBounds = t.createTransformedShape(labelBounds); labelBounds = rotatedLabelBounds.getBounds2D(); double labelx = state.getCursor() - insets.getRight() - labelBounds.getWidth() / 2.0; double labely = labelLocationY(this.labelLocation, dataArea); TextAnchor anchor = labelAnchorV(this.labelLocation); AttrStringUtils.drawRotatedString(label, g2, (float) labelx, (float) labely, anchor, getLabelAngle() - Math.PI / 2.0, anchor); state.cursorLeft(insets.getLeft() + labelBounds.getWidth() + insets.getRight()); } else if (edge == RectangleEdge.RIGHT) { AffineTransform t = AffineTransform.getRotateInstance( getLabelAngle() + Math.PI / 2.0, labelBounds.getCenterX(), labelBounds.getCenterY()); Shape rotatedLabelBounds = t.createTransformedShape(labelBounds); labelBounds = rotatedLabelBounds.getBounds2D(); double labelx = state.getCursor() + insets.getLeft() + labelBounds.getWidth() / 2.0; double labely = labelLocationY(this.labelLocation, dataArea); TextAnchor anchor = labelAnchorV(this.labelLocation); AttrStringUtils.drawRotatedString(label, g2, (float) labelx, (float) labely, anchor, getLabelAngle() + Math.PI / 2.0, anchor); state.cursorRight(insets.getLeft() + labelBounds.getWidth() + insets.getRight()); } return state; } /** * Draws an axis line at the current cursor position and edge. * * @param g2 the graphics device. * @param cursor the cursor position. * @param dataArea the data area. * @param edge the edge. */ protected void drawAxisLine(Graphics2D g2, double cursor, Rectangle2D dataArea, RectangleEdge edge) { Line2D axisLine = null; double x = dataArea.getX(); double y = dataArea.getY(); if (edge == RectangleEdge.TOP) { axisLine = new Line2D.Double(x, cursor, dataArea.getMaxX(), cursor); } else if (edge == RectangleEdge.BOTTOM) { axisLine = new Line2D.Double(x, cursor, dataArea.getMaxX(), cursor); } else if (edge == RectangleEdge.LEFT) { axisLine = new Line2D.Double(cursor, y, cursor, dataArea.getMaxY()); } else if (edge == RectangleEdge.RIGHT) { axisLine = new Line2D.Double(cursor, y, cursor, dataArea.getMaxY()); } g2.setPaint(this.axisLinePaint); g2.setStroke(this.axisLineStroke); Object saved = g2.getRenderingHint(RenderingHints.KEY_STROKE_CONTROL); g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_NORMALIZE); g2.draw(axisLine); g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, saved); } /** * Returns a clone of the axis. * * @return A clone. * * @throws CloneNotSupportedException if some component of the axis does * not support cloning. */ @Override public Object clone() throws CloneNotSupportedException { Axis clone = (Axis) super.clone(); // It's up to the plot which clones up to restore the correct references clone.plot = null; clone.listenerList = new EventListenerList(); return clone; } /** * Tests this axis for equality with another object. * * @param obj the object ({@code null} permitted). * * @return {@code true} or {@code false}. */ @Override public boolean equals(Object obj) { if (obj == this) { return true; } if (!(obj instanceof Axis)) { return false; } Axis that = (Axis) obj; if (this.visible != that.visible) { return false; } if (!Objects.equals(this.label, that.label)) { return false; } if (!AttributedStringUtils.equal(this.attributedLabel, that.attributedLabel)) { return false; } if (!Objects.equals(this.labelFont, that.labelFont)) { return false; } if (!PaintUtils.equal(this.labelPaint, that.labelPaint)) { return false; } if (!Objects.equals(this.labelInsets, that.labelInsets)) { return false; } if (this.labelAngle != that.labelAngle) { return false; } if (!this.labelLocation.equals(that.labelLocation)) { return false; } if (this.axisLineVisible != that.axisLineVisible) { return false; } if (!Objects.equals(this.axisLineStroke, that.axisLineStroke)) { return false; } if (!PaintUtils.equal(this.axisLinePaint, that.axisLinePaint)) { return false; } if (this.tickLabelsVisible != that.tickLabelsVisible) { return false; } if (!Objects.equals(this.tickLabelFont, that.tickLabelFont)) { return false; } if (!PaintUtils.equal(this.tickLabelPaint, that.tickLabelPaint)) { return false; } if (!Objects.equals(this.tickLabelInsets, that.tickLabelInsets)) { return false; } if (this.tickMarksVisible != that.tickMarksVisible) { return false; } if (this.tickMarkInsideLength != that.tickMarkInsideLength) { return false; } if (this.tickMarkOutsideLength != that.tickMarkOutsideLength) { return false; } if (!PaintUtils.equal(this.tickMarkPaint, that.tickMarkPaint)) { return false; } if (!Objects.equals(this.tickMarkStroke, that.tickMarkStroke)) { return false; } if (this.minorTickMarksVisible != that.minorTickMarksVisible) { return false; } if (this.minorTickMarkInsideLength != that.minorTickMarkInsideLength) { return false; } if (this.minorTickMarkOutsideLength != that.minorTickMarkOutsideLength) { return false; } if (this.fixedDimension != that.fixedDimension) { return false; } return true; } /** * Returns a hash code for this instance. * * @return A hash code. */ @Override public int hashCode() { int hash = 3; if (this.label != null) { hash = 83 * hash + this.label.hashCode(); } return hash; } /** * Provides serialization support. * * @param stream the output stream. * * @throws IOException if there is an I/O error. */ private void writeObject(ObjectOutputStream stream) throws IOException { stream.defaultWriteObject(); SerialUtils.writeAttributedString(this.attributedLabel, stream); SerialUtils.writePaint(this.labelPaint, stream); SerialUtils.writePaint(this.tickLabelPaint, stream); SerialUtils.writeStroke(this.axisLineStroke, stream); SerialUtils.writePaint(this.axisLinePaint, stream); SerialUtils.writeStroke(this.tickMarkStroke, stream); SerialUtils.writePaint(this.tickMarkPaint, stream); } /** * Provides serialization support. * * @param stream the input stream. * * @throws IOException if there is an I/O error. * @throws ClassNotFoundException if there is a classpath problem. */ private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException { stream.defaultReadObject(); this.attributedLabel = SerialUtils.readAttributedString(stream); this.labelPaint = SerialUtils.readPaint(stream); this.tickLabelPaint = SerialUtils.readPaint(stream); this.axisLineStroke = SerialUtils.readStroke(stream); this.axisLinePaint = SerialUtils.readPaint(stream); this.tickMarkStroke = SerialUtils.readStroke(stream); this.tickMarkPaint = SerialUtils.readPaint(stream); this.listenerList = new EventListenerList(); } }





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