Java Code Examples for org.jfree.chart.plot.CategoryPlot#getRangeAxis()

/**
 * Replaces the chart's dataset and then checks that the new dataset is OK.
 */
@Test
public void testReplaceDataset() {

    // create a dataset...
    Number[][] data = new Integer[][]
        {{new Integer(-30), new Integer(-20)},
         {new Integer(-10), new Integer(10)},
         {new Integer(20), new Integer(30)}};

    CategoryDataset newData = DatasetUtilities.createCategoryDataset("S",
            "C", data);

    LocalListener l = new LocalListener();
    this.chart.addChangeListener(l);
    CategoryPlot plot = (CategoryPlot) this.chart.getPlot();
    plot.setDataset(newData);
    assertEquals(true, l.flag);
    ValueAxis axis = plot.getRangeAxis();
    Range range = axis.getRange();
    assertTrue("Expecting the lower bound of the range to be around -30: "
               + range.getLowerBound(), range.getLowerBound() <= -30);
    assertTrue("Expecting the upper bound of the range to be around 30: "
               + range.getUpperBound(), range.getUpperBound() >= 30);

}
 

/**
 * Replaces the chart's dataset and then checks that the new dataset is OK.
 */
public void testReplaceDataset() {

    // create a dataset...
    Number[][] data = new Integer[][]
        {{new Integer(-30), new Integer(-20)},
         {new Integer(-10), new Integer(10)},
         {new Integer(20), new Integer(30)}};

    CategoryDataset newData = DatasetUtilities.createCategoryDataset("S",
            "C", data);

    LocalListener l = new LocalListener();
    this.chart.addChangeListener(l);
    CategoryPlot plot = (CategoryPlot) this.chart.getPlot();
    plot.setDataset(newData);
    assertEquals(true, l.flag);
    ValueAxis axis = plot.getRangeAxis();
    Range range = axis.getRange();
    assertTrue("Expecting the lower bound of the range to be around -30: "
               + range.getLowerBound(), range.getLowerBound() <= -30);
    assertTrue("Expecting the upper bound of the range to be around 30: "
               + range.getUpperBound(), range.getUpperBound() >= 30);

}
 

/**
 * Replaces the dataset and checks that it has changed as expected.
 */
@Test
public void testReplaceDataset() {

    // create a dataset...
    Number[][] data = new Integer[][]
        {{new Integer(-30), new Integer(-20)},
         {new Integer(-10), new Integer(10)},
         {new Integer(20), new Integer(30)}};

    CategoryDataset newData = DatasetUtilities.createCategoryDataset("S",
            "C", data);

    LocalListener l = new LocalListener();
    this.chart.addChangeListener(l);
    CategoryPlot plot = (CategoryPlot) this.chart.getPlot();
    plot.setDataset(newData);
    assertEquals(true, l.flag);
    ValueAxis axis = plot.getRangeAxis();
    Range range = axis.getRange();
    assertTrue("Expecting the lower bound of the range to be around -30: "
                + range.getLowerBound(), range.getLowerBound() <= -30);
    assertTrue("Expecting the upper bound of the range to be around 30: "
               + range.getUpperBound(), range.getUpperBound() >= 30);

}
 

/**
 * Replaces the dataset and checks that the data range is as expected.
 */
@Test
public void testReplaceDataset() {

    // create a dataset...
    Number[][] data = new Integer[][]
        {{new Integer(-30), new Integer(-20)},
         {new Integer(-10), new Integer(10)},
         {new Integer(20), new Integer(30)}};

    CategoryDataset newData = DatasetUtilities.createCategoryDataset("S",
            "C", data);

    LocalListener l = new LocalListener();
    this.chart.addChangeListener(l);
    CategoryPlot plot = (CategoryPlot) this.chart.getPlot();
    plot.setDataset(newData);
    assertEquals(true, l.flag);
    ValueAxis axis = plot.getRangeAxis();
    Range range = axis.getRange();
    assertTrue("Expecting the lower bound of the range to be around -30: "
            + range.getLowerBound(), range.getLowerBound() <= -30);
    assertTrue("Expecting the upper bound of the range to be around 30: "
            + range.getUpperBound(), range.getUpperBound() >= 30);

}
 

/**
 * Replaces the chart's dataset and then checks that the new dataset is OK.
 */
@Test
public void testReplaceDataset() {

    // create a dataset...
    Number[][] data = new Integer[][]
        {{new Integer(-30), new Integer(-20)},
         {new Integer(-10), new Integer(10)},
         {new Integer(20), new Integer(30)}};

    CategoryDataset newData = DatasetUtilities.createCategoryDataset("S",
            "C", data);

    LocalListener l = new LocalListener();
    this.chart.addChangeListener(l);
    CategoryPlot plot = (CategoryPlot) this.chart.getPlot();
    plot.setDataset(newData);
    assertEquals(true, l.flag);
    ValueAxis axis = plot.getRangeAxis();
    Range range = axis.getRange();
    assertTrue("Expecting the lower bound of the range to be around -30: "
               + range.getLowerBound(), range.getLowerBound() <= -30);
    assertTrue("Expecting the upper bound of the range to be around 30: "
               + range.getUpperBound(), range.getUpperBound() >= 30);

}
 

/**
 * Replaces the chart's dataset and then checks that the new dataset is OK.
 */
@Test
public void testReplaceDataset() {
    Number[][] data = new Integer[][]
        {{new Integer(-30), new Integer(-20)},
         {new Integer(-10), new Integer(10)},
         {new Integer(20), new Integer(30)}};

    CategoryDataset newData = DatasetUtilities.createCategoryDataset(
            "S", "C", data);
    LocalListener l = new LocalListener();
    this.chart.addChangeListener(l);
    CategoryPlot plot = (CategoryPlot) this.chart.getPlot();
    plot.setDataset(newData);
    assertEquals(true, l.flag);
    ValueAxis axis = plot.getRangeAxis();
    Range range = axis.getRange();
    assertTrue("Expecting the lower bound of the range to be around -30: "
               + range.getLowerBound(), range.getLowerBound() <= -30);
    assertTrue("Expecting the upper bound of the range to be around 30: "
               + range.getUpperBound(), range.getUpperBound() >= 30);

}
 

/**
 * Replaces the dataset and checks that it has changed as expected.
 */
public void testReplaceDataset() {

    // create a dataset...
    Number[][] data = new Integer[][]
        {{new Integer(-30), new Integer(-20)},
         {new Integer(-10), new Integer(10)},
         {new Integer(20), new Integer(30)}};

    CategoryDataset newData = DatasetUtilities.createCategoryDataset("S",
            "C", data);

    LocalListener l = new LocalListener();
    this.chart.addChangeListener(l);
    CategoryPlot plot = (CategoryPlot) this.chart.getPlot();
    plot.setDataset(newData);
    assertEquals(true, l.flag);
    ValueAxis axis = plot.getRangeAxis();
    Range range = axis.getRange();
    assertTrue("Expecting the lower bound of the range to be around -30: "
                + range.getLowerBound(), range.getLowerBound() <= -30);
    assertTrue("Expecting the upper bound of the range to be around 30: "
               + range.getUpperBound(), range.getUpperBound() >= 30);

}
 

/**
 * Replaces the dataset and checks that it has changed as expected.
 */
@Test
public void testReplaceDataset() {

    // create a dataset...
    Number[][] data = new Integer[][]
        {{new Integer(-30), new Integer(-20)},
         {new Integer(-10), new Integer(10)},
         {new Integer(20), new Integer(30)}};

    CategoryDataset newData = DatasetUtilities.createCategoryDataset("S",
            "C", data);

    LocalListener l = new LocalListener();
    this.chart.addChangeListener(l);
    CategoryPlot plot = (CategoryPlot) this.chart.getPlot();
    plot.setDataset(newData);
    assertEquals(true, l.flag);
    ValueAxis axis = plot.getRangeAxis();
    Range range = axis.getRange();
    assertTrue("Expecting the lower bound of the range to be around -30: "
                + range.getLowerBound(), range.getLowerBound() <= -30);
    assertTrue("Expecting the upper bound of the range to be around 30: "
               + range.getUpperBound(), range.getUpperBound() >= 30);

}
 

/**
 * Create graph based on the given dataset and constraints.
 *
 * @return The JFreeChart graph.
 */
protected JFreeChart createGraph() {
    // Create chart.
    JFreeChart chart = ChartFactory.createStackedAreaChart(null, null, yLabel, dataset, PlotOrientation.VERTICAL, true, true, false);
    chart.setBackgroundPaint(Color.WHITE);

    // Create chart legend.
    LegendTitle legend = chart.getLegend();
    legend.setPosition(RectangleEdge.RIGHT);

    // Create chart plot.
    CategoryPlot plot = (CategoryPlot) chart.getPlot();
    plot.setForegroundAlpha(0.7f);
    plot.setBackgroundPaint(Color.WHITE);
    plot.setRangeGridlinePaint(Color.darkGray);

    // Create domain (x) axis.
    CategoryAxis domain = new ShiftedCategoryAxis(xLabel);
    domain.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
    domain.setLowerMargin(0.0);
    domain.setUpperMargin(0.0);
    domain.setCategoryMargin(0.0);
    plot.setDomainAxis(domain);

    // Create range (y) axis.
    NumberAxis range = (NumberAxis) plot.getRangeAxis();
    range.setAutoRange(true);
    range.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    // Create renderer and paint the chart.
    CategoryItemRenderer renderer = plot.getRenderer();
    plot.setInsets(new RectangleInsets(5.0, 0, 0, 5.0));

    // Set chart colors for sections.
    for (int i = 0; i < colors.length; i++) {
        renderer.setSeriesPaint(i, colors[i]);
    }
    return chart;
}
 

public JFreeChart createChart(DatasetMap datasetMap) {

		BoxAndWhiskerCategoryDataset dataset=(BoxAndWhiskerCategoryDataset)datasetMap.getDatasets().get("1"); 

		JFreeChart chart = ChartFactory.createBoxAndWhiskerChart(
				name, categoryLabel, valueLabel, dataset, 
				false);

		TextTitle title =setStyleTitle(name, styleTitle);
		chart.setTitle(title);
		if(subName!= null && !subName.equals("")){
			TextTitle subTitle =setStyleTitle(subName, styleSubTitle);
			chart.addSubtitle(subTitle);
		}
		
		CategoryPlot plot = (CategoryPlot) chart.getPlot();
		BoxAndWhiskerRenderer renderer=(BoxAndWhiskerRenderer)plot.getRenderer();
		chart.setBackgroundPaint(Color.white);

		plot.setBackgroundPaint(new Color(Integer.decode("#c0c0c0").intValue()));
		plot.setDomainGridlinePaint(Color.WHITE);
		plot.setDomainGridlinesVisible(true);
		plot.setRangeGridlinePaint(Color.white);
		renderer.setFillBox(true);
		renderer.setArtifactPaint(Color.BLACK);
		renderer.setSeriesPaint(0,new Color(Integer.decode("#0000FF").intValue()));

		NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
		rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
		rangeAxis.setRange(min, max);

		return chart;
	}
 

private byte[] generateStackedAreaChart (CategoryDataset dataset, int width, int height)
{
	JFreeChart chart = ChartFactory.createStackedAreaChart (null, // chart title
			null, // domain axis label
			null, // range axis label
			dataset, // data
			PlotOrientation.VERTICAL, // the plot orientation
			true, // legend
			true, // tooltips
			false // urls
			);

	// set background
	chart.setBackgroundPaint (parseColor (statsManager.getChartBackgroundColor ()));

	// set chart border
	chart.setPadding (new RectangleInsets (10, 5, 5, 5));
	chart.setBorderVisible (true);
	chart.setBorderPaint (parseColor ("#cccccc"));

	// set anti alias
	chart.setAntiAlias (true);

	CategoryPlot plot = (CategoryPlot) chart.getPlot ();

	// set transparency
	plot.setForegroundAlpha (0.7f);
	plot.setAxisOffset (new RectangleInsets (5.0, 5.0, 5.0, 5.0));
	plot.setBackgroundPaint (Color.lightGray);
	plot.setDomainGridlinesVisible (true);
	plot.setDomainGridlinePaint (Color.white);
	plot.setRangeGridlinesVisible (true);
	plot.setRangeGridlinePaint (Color.white);

	// set colour of regular users using Karate belt colour: white, green, blue, brown, black/gold
	CategoryItemRenderer renderer = plot.getRenderer ();
	renderer.setSeriesPaint (0, new Color (205, 173, 0)); // gold users
	renderer.setSeriesPaint (1, new Color (139, 69, 19));
	renderer.setSeriesPaint (2, Color.BLUE);
	renderer.setSeriesPaint (3, Color.GREEN);
	renderer.setSeriesPaint (4, Color.WHITE);

	// set the range axis to display integers only...
	NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis ();
	rangeAxis.setStandardTickUnits (NumberAxis.createIntegerTickUnits ());

	CategoryAxis domainAxis = (CategoryAxis) plot.getDomainAxis ();
	domainAxis.setCategoryLabelPositions (CategoryLabelPositions.DOWN_45);
       domainAxis.setLowerMargin(0.0);
       domainAxis.setUpperMargin(0.0);

       BufferedImage img = chart.createBufferedImage (width, height);
	final ByteArrayOutputStream out = new ByteArrayOutputStream();
	try{
		ImageIO.write(img, "png", out);
	}catch(IOException e){
		log.warn("Error occurred while generating SiteStats chart image data", e);
	}
	return out.toByteArray();
}
 

private byte[] generateStackedAreaChart (CategoryDataset dataset, int width, int height)
{
	JFreeChart chart = ChartFactory.createStackedAreaChart (null, // chart title
			null, // domain axis label
			null, // range axis label
			dataset, // data
			PlotOrientation.VERTICAL, // the plot orientation
			true, // legend
			true, // tooltips
			false // urls
			);

	// set background
	chart.setBackgroundPaint (parseColor (statsManager.getChartBackgroundColor ()));

	// set chart border
	chart.setPadding (new RectangleInsets (10, 5, 5, 5));
	chart.setBorderVisible (true);
	chart.setBorderPaint (parseColor ("#cccccc"));

	// set anti alias
	chart.setAntiAlias (true);

	CategoryPlot plot = (CategoryPlot) chart.getPlot ();

	// set transparency
	plot.setForegroundAlpha (0.7f);
	plot.setAxisOffset (new RectangleInsets (5.0, 5.0, 5.0, 5.0));
	plot.setBackgroundPaint (Color.lightGray);
	plot.setDomainGridlinesVisible (true);
	plot.setDomainGridlinePaint (Color.white);
	plot.setRangeGridlinesVisible (true);
	plot.setRangeGridlinePaint (Color.white);

	// set colour of regular users using Karate belt colour: white, green, blue, brown, black/gold
	CategoryItemRenderer renderer = plot.getRenderer ();
	renderer.setSeriesPaint (0, new Color (205, 173, 0)); // gold users
	renderer.setSeriesPaint (1, new Color (139, 69, 19));
	renderer.setSeriesPaint (2, Color.BLUE);
	renderer.setSeriesPaint (3, Color.GREEN);
	renderer.setSeriesPaint (4, Color.WHITE);

	// set the range axis to display integers only...
	NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis ();
	rangeAxis.setStandardTickUnits (NumberAxis.createIntegerTickUnits ());

	CategoryAxis domainAxis = (CategoryAxis) plot.getDomainAxis ();
	domainAxis.setCategoryLabelPositions (CategoryLabelPositions.DOWN_45);
       domainAxis.setLowerMargin(0.0);
       domainAxis.setUpperMargin(0.0);

       BufferedImage img = chart.createBufferedImage (width, height);
	final ByteArrayOutputStream out = new ByteArrayOutputStream();
	try{
		ImageIO.write(img, "png", out);
	}catch(IOException e){
		log.warn("Error occurred while generating SiteStats chart image data", e);
	}
	return out.toByteArray();
}
 

/**
 * A check for the interaction between the 'autoRangeIncludesZero' flag
 * and the base setting in the BarRenderer.
 */
@Test
public void testAutoRange4() {
    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    dataset.setValue(100.0, "Row 1", "Column 1");
    dataset.setValue(200.0, "Row 1", "Column 2");
    JFreeChart chart = ChartFactory.createBarChart("Test", "Categories",
            "Value", dataset, PlotOrientation.VERTICAL, false, false,
            false);
    CategoryPlot plot = (CategoryPlot) chart.getPlot();
    NumberAxis axis = (NumberAxis) plot.getRangeAxis();
    axis.setAutoRangeIncludesZero(false);
    BarRenderer br = (BarRenderer) plot.getRenderer();
    br.setIncludeBaseInRange(false);
    assertEquals(95.0, axis.getLowerBound(), EPSILON);
    assertEquals(205.0, axis.getUpperBound(), EPSILON);

    br.setIncludeBaseInRange(true);
    assertEquals(0.0, axis.getLowerBound(), EPSILON);
    assertEquals(210.0, axis.getUpperBound(), EPSILON);

    axis.setAutoRangeIncludesZero(true);
    assertEquals(0.0, axis.getLowerBound(), EPSILON);
    assertEquals(210.0, axis.getUpperBound(), EPSILON);

    br.setIncludeBaseInRange(true);
    assertEquals(0.0, axis.getLowerBound(), EPSILON);
    assertEquals(210.0, axis.getUpperBound(), EPSILON);

    // now replacing the dataset should update the axis range...
    DefaultCategoryDataset dataset2 = new DefaultCategoryDataset();
    dataset2.setValue(900.0, "Row 1", "Column 1");
    dataset2.setValue(1000.0, "Row 1", "Column 2");
    plot.setDataset(dataset2);
    assertEquals(0.0, axis.getLowerBound(), EPSILON);
    assertEquals(1050.0, axis.getUpperBound(), EPSILON);

    br.setIncludeBaseInRange(false);
    assertEquals(0.0, axis.getLowerBound(), EPSILON);
    assertEquals(1050.0, axis.getUpperBound(), EPSILON);

    axis.setAutoRangeIncludesZero(false);
    assertEquals(895.0, axis.getLowerBound(), EPSILON);
    assertEquals(1005.0, axis.getUpperBound(), EPSILON);
}
 

/**
 * Creates a sample chart.
 * 
 * @param dataset  the dataset.
 * 
 * @return The chart.
 */
private static JFreeChart createChart(CategoryDataset dataset) {
    
    // create the chart...
    JFreeChart chart = ChartFactory.createBarChart(
        "Bar Chart Demo 1",       // chart title
        "Category",               // domain axis label
        "Value",                  // range axis label
        dataset,                  // data
        PlotOrientation.VERTICAL, // orientation
        true,                     // include legend
        true,                     // tooltips?
        false                     // URLs?
    );

    // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

    // set the background color for the chart...
    chart.setBackgroundPaint(Color.white);

    // get a reference to the plot for further customisation...
    CategoryPlot plot = (CategoryPlot) chart.getPlot();
    plot.setBackgroundPaint(Color.lightGray);
    plot.setDomainGridlinePaint(Color.white);
    plot.setDomainGridlinesVisible(true);
    plot.setRangeGridlinePaint(Color.white);

    // ******************************************************************
    //  More than 150 demo applications are included with the JFreeChart
    //  Developer Guide...for more information, see:
    //
    //  >   http://www.object-refinery.com/jfreechart/guide.html
    //
    // ******************************************************************
    
    // set the range axis to display integers only...
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    // disable bar outlines...
    BarRenderer renderer = (BarRenderer) plot.getRenderer();
    renderer.setDrawBarOutline(false);
    
    // set up gradient paints for series...
    GradientPaint gp0 = new GradientPaint(0.0f, 0.0f, Color.blue, 
            0.0f, 0.0f, new Color(0, 0, 64));
    GradientPaint gp1 = new GradientPaint(0.0f, 0.0f, Color.green, 
            0.0f, 0.0f, new Color(0, 64, 0));
    GradientPaint gp2 = new GradientPaint(0.0f, 0.0f, Color.red, 
            0.0f, 0.0f, new Color(64, 0, 0));
    renderer.setSeriesPaint(0, gp0);
    renderer.setSeriesPaint(1, gp1);
    renderer.setSeriesPaint(2, gp2);

    CategoryAxis domainAxis = plot.getDomainAxis();
    domainAxis.setCategoryLabelPositions(
            CategoryLabelPositions.createUpRotationLabelPositions(
                    Math.PI / 6.0));
    // OPTIONAL CUSTOMISATION COMPLETED.
    
    return chart;
    
}
 

private byte[] createToolAnalysisChart (int width, int height)
{
	CategoryDataset dataset = getToolAnalysisDataSet ();
	
	if (dataset == null) {
		return generateNoDataChart(width, height);
	}
			
	JFreeChart chart = ChartFactory.createBarChart (
			null, // chart title
			null, // domain axis label
			null, // range axis label
			dataset, // data
			PlotOrientation.HORIZONTAL, // the plot orientation
			false, // legend
			false, // tooltips
			false // urls
	);
	
	// set background
	chart.setBackgroundPaint (parseColor (statsManager.getChartBackgroundColor ()));

	// set chart border
	chart.setPadding (new RectangleInsets (10, 5, 5, 5));
	chart.setBorderVisible (true);
	chart.setBorderPaint (parseColor ("#cccccc"));

	// set anti alias
	chart.setAntiAlias (true);

	CategoryPlot plot = (CategoryPlot) chart.getPlot ();

	// set transparency
	plot.setForegroundAlpha (0.7f);
	plot.setAxisOffset (new RectangleInsets (5.0, 5.0, 5.0, 5.0));
	plot.setBackgroundPaint (Color.lightGray);
	plot.setDomainGridlinesVisible (false);
	plot.setRangeGridlinesVisible (true);
	plot.setRangeGridlinePaint (Color.white);
	
       CategoryAxis domainAxis = plot.getDomainAxis();
       domainAxis.setVisible(false);
       domainAxis.setUpperMargin (0);
       domainAxis.setLowerMargin (0);
       
       NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
       rangeAxis.setUpperMargin(0.20);
	rangeAxis.setStandardTickUnits (NumberAxis.createIntegerTickUnits ());
       
       BarRenderer renderer = (BarRenderer) plot.getRenderer();
       CategoryItemLabelGenerator generator 
           = new StandardCategoryItemLabelGenerator("{1}", 
                   NumberFormat.getInstance(new ResourceLoader().getLocale()));
       renderer.setDefaultItemLabelGenerator(generator);
       renderer.setDefaultItemLabelFont(new Font("SansSerif", Font.PLAIN, 9));
       renderer.setDefaultItemLabelsVisible(true);
       renderer.setItemMargin (0);
       renderer.setSeriesPaint (0, Color.BLUE);
       
       BufferedImage img = chart.createBufferedImage (width, height);
	final ByteArrayOutputStream out = new ByteArrayOutputStream();
	try{
		ImageIO.write(img, "png", out);
	}catch(IOException e){
		log.warn("Error occurred while generating SiteStats chart image data", e);
	}
	return out.toByteArray();
}
 

/**
 * Returns a range axis for a plot.
 *
 * @param plot  the plot.
 * @param index  the axis index.
 *
 * @return A range axis.
 */
protected ValueAxis getRangeAxis(CategoryPlot plot, int index) {
    ValueAxis result = plot.getRangeAxis(index);
    if (result == null) {
        result = plot.getRangeAxis();
    }
    return result;
}
 

/**
 * Returns a range axis for a plot.
 *
 * @param plot  the plot.
 * @param index  the axis index.
 *
 * @return A range axis.
 */
protected ValueAxis getRangeAxis(CategoryPlot plot, int index) {
    ValueAxis result = plot.getRangeAxis(index);
    if (result == null) {
        result = plot.getRangeAxis();
    }
    return result;
}
 

/**
 * Returns a range axis for a plot.
 *
 * @param plot  the plot.
 * @param index  the axis index.
 *
 * @return A range axis.
 */
protected ValueAxis getRangeAxis(CategoryPlot plot, int index) {
    ValueAxis result = plot.getRangeAxis(index);
    if (result == null) {
        result = plot.getRangeAxis();
    }
    return result;
}
 

/**
 * Returns a range axis for a plot.
 *
 * @param plot  the plot.
 * @param index  the axis index.
 *
 * @return A range axis.
 */
protected ValueAxis getRangeAxis(CategoryPlot plot, int index) {
    ValueAxis result = plot.getRangeAxis(index);
    if (result == null) {
        result = plot.getRangeAxis();
    }
    return result;
}
 

/**
 * Returns a range axis for a plot.
 *
 * @param plot  the plot.
 * @param index  the axis index.
 *
 * @return A range axis.
 */
protected ValueAxis getRangeAxis(CategoryPlot plot, int index) {
    ValueAxis result = plot.getRangeAxis(index);
    if (result == null) {
        result = plot.getRangeAxis();
    }
    return result;
}