org.jfree.data.xy.DefaultTableXYDataset Java Examples

/**
 * Test chart drawing with an empty dataset to ensure that this special
 * case doesn't cause any exceptions.
 */
@Test
public void testDrawWithEmptyDataset() {
    boolean success = false;
    JFreeChart chart = ChartFactory.createStackedXYAreaChart("title", "x",
            "y", new DefaultTableXYDataset(), PlotOrientation.VERTICAL,
            true, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    plot.setRenderer(new StackedXYAreaRenderer2());
    try {
        BufferedImage image = new BufferedImage(200 , 100,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null, null);
        g2.dispose();
        success = true;
    }
    catch (Exception e) {
        success = false;
    }
    assertTrue(success);
}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
public void testEquals() {

    DefaultTableXYDataset d1 = new DefaultTableXYDataset();
    XYSeries s1 = new XYSeries("Series 1", true, false);
    s1.add(1.0, 1.1);
    s1.add(2.0, 2.2);
    d1.addSeries(s1);

    DefaultTableXYDataset d2 = new DefaultTableXYDataset();
    XYSeries s2 = new XYSeries("Series 1", true, false);
    s2.add(1.0, 1.1);
    s2.add(2.0, 2.2);
    d2.addSeries(s2);

    assertTrue(d1.equals(d2));
    assertTrue(d2.equals(d1));

    s1.add(3.0, 3.3);
    assertFalse(d1.equals(d2));

    s2.add(3.0, 3.3);
    assertTrue(d1.equals(d2));

}
 

/**
 * Tests the auto-pruning feature.
 */
public void testAutoPrune() {

    // WITH AUTOPRUNING
    DefaultTableXYDataset dataset = new DefaultTableXYDataset(true);
    dataset.addSeries(createSeriesA());
    assertEquals(2, dataset.getItemCount());  // should be 2 items
    dataset.addSeries(createSeriesB());
    assertEquals(2, dataset.getItemCount());  // still 2
    dataset.removeSeries(1);
    assertEquals(1, dataset.getItemCount());  // 1 value pruned.

    // WITHOUT AUTOPRUNING
    DefaultTableXYDataset dataset2 = new DefaultTableXYDataset(true);
    dataset2.addSeries(createSeriesA());
    assertEquals(2, dataset2.getItemCount());  // should be 2 items
    dataset2.addSeries(createSeriesB());
    assertEquals(2, dataset2.getItemCount());  // still 2
    dataset2.removeSeries(1);
    assertEquals(1, dataset2.getItemCount());  // still 2.

}
 

/**
 * Creates a sample dataset for testing purposes.
 * 
 * @return A sample dataset.
 */
private TableXYDataset createTableXYDataset1() {
    DefaultTableXYDataset dataset = new DefaultTableXYDataset();
    
    XYSeries s1 = new XYSeries("Series 1", true, false);
    s1.add(1.0, 1.0);
    s1.add(2.0, 2.0);
    dataset.addSeries(s1);
    
    XYSeries s2 = new XYSeries("Series 2", true, false);
    s2.add(1.0, -2.0);
    s2.add(2.0, -1.0);
    dataset.addSeries(s2);
    
    return dataset;  
}
 

/**
 * Tests the auto-pruning feature.
 */
public void testAutoPrune() {
    
    // WITH AUTOPRUNING
    DefaultTableXYDataset dataset = new DefaultTableXYDataset(true);
    dataset.addSeries(createSeriesA());
    assertEquals(2, dataset.getItemCount());  // should be 2 items
    dataset.addSeries(createSeriesB());
    assertEquals(2, dataset.getItemCount());  // still 2
    dataset.removeSeries(1);
    assertEquals(1, dataset.getItemCount());  // 1 value pruned.

    // WITHOUT AUTOPRUNING
    DefaultTableXYDataset dataset2 = new DefaultTableXYDataset(true);
    dataset2.addSeries(createSeriesA());
    assertEquals(2, dataset2.getItemCount());  // should be 2 items
    dataset2.addSeries(createSeriesB());
    assertEquals(2, dataset2.getItemCount());  // still 2
    dataset2.removeSeries(1);
    assertEquals(1, dataset2.getItemCount());  // still 2.
    
}
 

/**
 * Check that the renderer is calculating the range bounds correctly.
 */
@Test
public void testFindRangeBounds() {
    TableXYDataset dataset
            = RendererXYPackageUtils.createTestTableXYDataset();
    JFreeChart chart = ChartFactory.createStackedXYAreaChart(
            "Test Chart", "X", "Y", dataset, PlotOrientation.VERTICAL,
            false, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    StackedXYAreaRenderer2 renderer = new StackedXYAreaRenderer2();
    plot.setRenderer(renderer);
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    Range bounds = rangeAxis.getRange();
    assertTrue(bounds.contains(6.0));
    assertTrue(bounds.contains(8.0));

    // try null argument
    assertNull(renderer.findRangeBounds(null));

    // try empty dataset
    assertNull(renderer.findRangeBounds(new DefaultTableXYDataset()));
}
 

/**
 * Creates a sample dataset for testing purposes.
 *
 * @return A sample dataset.
 */
private TableXYDataset createTableXYDataset1() {
    DefaultTableXYDataset dataset = new DefaultTableXYDataset();

    XYSeries s1 = new XYSeries("Series 1", true, false);
    s1.add(1.0, 1.0);
    s1.add(2.0, 2.0);
    dataset.addSeries(s1);

    XYSeries s2 = new XYSeries("Series 2", true, false);
    s2.add(1.0, -2.0);
    s2.add(2.0, -1.0);
    dataset.addSeries(s2);

    return dataset;
}
 

/**
 * Test chart drawing with an empty dataset to ensure that this special
 * case doesn't cause any exceptions.
 */
@Test
public void testDrawWithEmptyDataset() {
    boolean success = false;
    JFreeChart chart = ChartFactory.createStackedXYAreaChart("title", "x",
            "y", new DefaultTableXYDataset(), PlotOrientation.VERTICAL,
            true, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    plot.setRenderer(new StackedXYAreaRenderer2());
    try {
        BufferedImage image = new BufferedImage(200 , 100,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null, null);
        g2.dispose();
        success = true;
    }
    catch (Exception e) {
        success = false;
    }
    assertTrue(success);
}
 

/**
 * Test chart drawing with an empty dataset to ensure that this special
 * case doesn't cause any exceptions.
 */
public void testDrawWithEmptyDataset() {
    boolean success = false;
    JFreeChart chart = ChartFactory.createStackedXYAreaChart("title", "x",
            "y", new DefaultTableXYDataset(), true);
    XYPlot plot = (XYPlot) chart.getPlot();
    plot.setRenderer(new StackedXYAreaRenderer2());
    try {
        BufferedImage image = new BufferedImage(200 , 100,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null, null);
        g2.dispose();
        success = true;
    }
    catch (Exception e) {
        success = false;
    }
    assertTrue(success);
}
 

/**
 * Creates a sample dataset for testing purposes.
 *
 * @return A sample dataset.
 */
private TableXYDataset createTableXYDataset1() {
    DefaultTableXYDataset dataset = new DefaultTableXYDataset();

    XYSeries s1 = new XYSeries("Series 1", true, false);
    s1.add(1.0, 1.0);
    s1.add(2.0, 2.0);
    dataset.addSeries(s1);

    XYSeries s2 = new XYSeries("Series 2", true, false);
    s2.add(1.0, -2.0);
    s2.add(2.0, -1.0);
    dataset.addSeries(s2);

    return dataset;
}
 

/**
 * Test chart drawing with an empty dataset to ensure that this special
 * case doesn't cause any exceptions.
 */
@Test
public void testDrawWithEmptyDataset() {
    boolean success = false;
    JFreeChart chart = ChartFactory.createStackedXYAreaChart("title", "x",
            "y", new DefaultTableXYDataset(), PlotOrientation.VERTICAL,
            true, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    plot.setRenderer(new StackedXYAreaRenderer2());
    try {
        BufferedImage image = new BufferedImage(200 , 100,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null, null);
        g2.dispose();
        success = true;
    }
    catch (Exception e) {
        success = false;
    }
    assertTrue(success);
}
 

/**
 * Check that the renderer is calculating the range bounds correctly.
 */
@Test
public void testFindRangeBounds() {
    TableXYDataset dataset
            = RendererXYPackageUtils.createTestTableXYDataset();
    JFreeChart chart = ChartFactory.createStackedXYAreaChart(
            "Test Chart", "X", "Y", dataset, PlotOrientation.VERTICAL,
            false, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    StackedXYAreaRenderer2 renderer = new StackedXYAreaRenderer2();
    plot.setRenderer(renderer);
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    Range bounds = rangeAxis.getRange();
    assertTrue(bounds.contains(6.0));
    assertTrue(bounds.contains(8.0));

    // try null argument
    assertNull(renderer.findRangeBounds(null));

    // try empty dataset
    assertNull(renderer.findRangeBounds(new DefaultTableXYDataset()));
}
 

/**
 * Check that the renderer is calculating the range bounds correctly.
 */
@Test
public void testFindRangeBounds() {
    TableXYDataset dataset
            = RendererXYPackageUtils.createTestTableXYDataset();
    JFreeChart chart = ChartFactory.createStackedXYAreaChart(
            "Test Chart", "X", "Y", dataset, PlotOrientation.VERTICAL,
            false, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    StackedXYAreaRenderer2 renderer = new StackedXYAreaRenderer2();
    plot.setRenderer(renderer);
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    Range bounds = rangeAxis.getRange();
    assertTrue(bounds.contains(6.0));
    assertTrue(bounds.contains(8.0));

    // try null argument
    assertNull(renderer.findRangeBounds(null));

    // try empty dataset
    assertNull(renderer.findRangeBounds(new DefaultTableXYDataset()));
}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
public void testEquals() {
    
    DefaultTableXYDataset d1 = new DefaultTableXYDataset();
    XYSeries s1 = new XYSeries("Series 1", true, false);
    s1.add(1.0, 1.1);
    s1.add(2.0, 2.2);
    d1.addSeries(s1);
    
    DefaultTableXYDataset d2 = new DefaultTableXYDataset();
    XYSeries s2 = new XYSeries("Series 1", true, false);
    s2.add(1.0, 1.1);
    s2.add(2.0, 2.2);
    d2.addSeries(s2);
    
    assertTrue(d1.equals(d2));
    assertTrue(d2.equals(d1));

    s1.add(3.0, 3.3);
    assertFalse(d1.equals(d2));

    s2.add(3.0, 3.3);
    assertTrue(d1.equals(d2));

}
 

/**
 * Creates a sample dataset for testing purposes.
 *
 * @return A sample dataset.
 */
private TableXYDataset createTableXYDataset1() {
    DefaultTableXYDataset dataset = new DefaultTableXYDataset();

    XYSeries s1 = new XYSeries("Series 1", true, false);
    s1.add(1.0, 1.0);
    s1.add(2.0, 2.0);
    dataset.addSeries(s1);

    XYSeries s2 = new XYSeries("Series 2", true, false);
    s2.add(1.0, -2.0);
    s2.add(2.0, -1.0);
    dataset.addSeries(s2);

    return dataset;
}
 

/**
 * Check that the renderer is calculating the range bounds correctly.
 */
@Test
public void testFindRangeBounds() {
    TableXYDataset dataset
            = RendererXYPackageUtils.createTestTableXYDataset();
    JFreeChart chart = ChartFactory.createStackedXYAreaChart(
            "Test Chart", "X", "Y", dataset, PlotOrientation.VERTICAL,
            false, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    StackedXYAreaRenderer2 renderer = new StackedXYAreaRenderer2();
    plot.setRenderer(renderer);
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    Range bounds = rangeAxis.getRange();
    assertTrue(bounds.contains(6.0));
    assertTrue(bounds.contains(8.0));

    // try null argument
    assertNull(renderer.findRangeBounds(null));

    // try empty dataset
    assertNull(renderer.findRangeBounds(new DefaultTableXYDataset()));
}
 

/**
 * Draws the chart with a <code>null</code> info object to make sure that
 * no exceptions are thrown (particularly by code in the renderer).
 */
@Test
public void testDrawWithNullInfo() {
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();

        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);

        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset,
                new NumberAxis("X"), new NumberAxis("Y"),
                new XYStepAreaRenderer());
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                null);
    }
    catch (NullPointerException e) {
        fail("No exception should be thrown.");
    }
}
 

/**
 * Draws the chart with a <code>null</code> info object to make sure that
 * no exceptions are thrown (particularly by code in the renderer).
 */
@Test
public void testDrawWithNullInfo() {
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();

        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);

        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset,
                new NumberAxis("X"), new NumberAxis("Y"),
                new XYStepRenderer());
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                null);
    }
    catch (NullPointerException e) {
        fail("No exception should be thrown.");
    }
}
 

/**
 * Draws the chart with a <code>null</code> info object to make sure that 
 * no exceptions are thrown.
 */
@Test
public void testDrawWithNullInfo() {
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();
    
        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);
    
        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset, 
                new NumberAxis("X"), new NumberAxis("Y"), 
                new XYLineAndShapeRenderer());
        plot.addAnnotation(new XYTitleAnnotation(5.0, 6.0, 
                new TextTitle("Hello World!")));
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200, 
                null);
    }
    catch (NullPointerException e) {
        fail("There should be no exception.");
    }
}
 

/**
 * A test for bug 1593156.
 */
public void testBug1593156() {
    boolean success = false;
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();

        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);

        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        StackedXYAreaRenderer renderer = new StackedXYAreaRenderer(
                XYAreaRenderer.LINES);
        XYPlot plot = new XYPlot(dataset,
                new NumberAxis("X"), new NumberAxis("Y"),
                renderer);
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                null);
        success = true;
    }
    catch (NullPointerException e) {
        e.printStackTrace();
        success = false;
    }
    assertTrue(success);
}
 

/**
 * Draws the chart with a <code>null</code> info object to make sure that
 * no exceptions are thrown (particularly by code in the renderer).
 */
@Test
public void testDrawWithNullInfo() {
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();

        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);

        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset,
                new NumberAxis("X"), new NumberAxis("Y"),
                new XYStepAreaRenderer());
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                null);
    }
    catch (NullPointerException e) {
        fail("No exception should be thrown.");
    }
}
 

/**
 * Draws the chart with a <code>null</code> value in the dataset to make
 * sure that no exceptions are thrown.
 */
@Test
public void testDrawWithNullValue() {
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();

        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, null);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);

        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, null);
        s2.add(20.0, null);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset,
                new NumberAxis("X"), new NumberAxis("Y"),
                new XYStepRenderer());
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                null);
    }
    catch (NullPointerException e) {
        fail("No exception should be thrown.");
    }
}
 

/**
 * Draws the chart with a <code>null</code> info object to make sure that
 * no exceptions are thrown (particularly by code in the renderer).
 */
@Test
public void testDrawWithNullInfo() {
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();

        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);

        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset,
                new NumberAxis("X"), new NumberAxis("Y"),
                new XYStepRenderer());
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                null);
    }
    catch (NullPointerException e) {
        fail("No exception should be thrown.");
    }
}
 

/**
 * A test for bug 1593156.
 */
@Test
public void testBug1593156() {
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();

        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);

        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        StackedXYAreaRenderer renderer = new StackedXYAreaRenderer(
                XYAreaRenderer.LINES);
        XYPlot plot = new XYPlot(dataset,
                new NumberAxis("X"), new NumberAxis("Y"),
                renderer);
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                null);
    }
    catch (NullPointerException e) {
        fail("No exception should be thrown.");
    }
}
 

/**
 * Draws the chart with a <code>null</code> info object to make sure that
 * no exceptions are thrown (particularly by code in the renderer).
 */
@Test
public void testDrawWithNullInfo() {
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();

        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);

        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset,
                new NumberAxis("X"), new NumberAxis("Y"),
                new StackedXYAreaRenderer());
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                null);
    }
    catch (NullPointerException e) {
        fail("No exception should be thrown.");
    }
}
 

/**
 * Creates and returns a sample dataset for testing purposes.
 *
 * @return A sample dataset.
 */
public static TableXYDataset createTestTableXYDataset() {
    DefaultTableXYDataset result = new DefaultTableXYDataset();
    XYSeries series1 = new XYSeries("Series 1", false, false);
    series1.add(1.0, 2.0);
    series1.add(2.0, 5.0);
    XYSeries series2 = new XYSeries("Series 2", false, false);
    series2.add(1.0, 4.0);
    series2.add(2.0, 3.0);
    result.addSeries(series1);
    result.addSeries(series2);
    return result;
}
 

/**
 * Draws the chart with a <code>null</code> info object to make sure that
 * no exceptions are thrown (particularly by code in the renderer).
 */
@Test
public void testDrawWithNullInfo() {
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();

        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);

        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset,
                new NumberAxis("X"), new NumberAxis("Y"),
                new XYAreaRenderer());
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                null);
    }
    catch (NullPointerException e) {
        fail("No exception should be thrown.");
    }
}
 

/**
 * Test that removing all values for a given x works.
 */
public void testRemoveAllValuesForX() {
    DefaultTableXYDataset dataset = new DefaultTableXYDataset();
    dataset.addSeries(createSeries1());
    dataset.addSeries(createSeries2());
    dataset.removeAllValuesForX(new Double(2.0));
    assertEquals(5, dataset.getItemCount());
    assertEquals(new Double(1.0), dataset.getX(0, 0));
    assertEquals(new Double(3.0), dataset.getX(0, 1));
    assertEquals(new Double(4.0), dataset.getX(0, 2));
    assertEquals(new Double(5.0), dataset.getX(0, 3));
    assertEquals(new Double(6.0), dataset.getX(0, 4));
}
 

/**
 * Draws the chart with a <code>null</code> info object to make sure that 
 * no exceptions are thrown (particularly by code in the renderer).
 */
public void testDrawWithNullInfo() {
    boolean success = false;
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();
    
        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);
    
        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset, 
                new NumberAxis("X"), new NumberAxis("Y"), 
                new XYAreaRenderer2());
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200, 
                null);
        success = true;
    }
    catch (NullPointerException e) {
        e.printStackTrace();
        success = false;
    }
    assertTrue(success);
}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
public void testEquals() {

    DefaultTableXYDataset d1 = new DefaultTableXYDataset();
    DefaultTableXYDataset d2 = new DefaultTableXYDataset();
    assertTrue(d1.equals(d2));
    assertTrue(d2.equals(d1));

    d1.addSeries(createSeries1());
    assertFalse(d1.equals(d2));

    d2.addSeries(createSeries1());
    assertTrue(d1.equals(d2));

}