Java JFreeChart.draw方法代码示例

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
/**
 * Draws the chart with a single range.  At one point, this caused a null
 * pointer exception (fixed now).
 */
public void testDrawWithNullInfo() {
    boolean success = false;
    MeterPlot plot = new MeterPlot(new DefaultValueDataset(60.0));
    plot.addInterval(new MeterInterval("Normal", new Range(0.0, 80.0)));
    JFreeChart chart = new JFreeChart(plot);
    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);
}
 

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
public void paintDeviationChart(Graphics graphics, int width, int height) {
	prepareData();

	JFreeChart chart = createChart(this.dataset);

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

	// legend settings
	LegendTitle legend = chart.getLegend();
	if (legend != null) {
		legend.setPosition(RectangleEdge.TOP);
		legend.setFrame(BlockBorder.NONE);
		legend.setHorizontalAlignment(HorizontalAlignment.LEFT);
	}

	Rectangle2D drawRect = new Rectangle2D.Double(0, 0, width, height);
	chart.draw((Graphics2D) graphics, drawRect);
}
 

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
/**
 * Tests that no exceptions are thrown when there is a <code>null</code> value in the dataset.
 */
public void testNullValueInDataset() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    dataset.setValue("Section 1", 10.0);
    dataset.setValue("Section 2", 11.0);
    dataset.setValue("Section 3", null);
    JFreeChart chart = createPieChart3D(dataset);
    boolean success = false;
    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 (Throwable t) {
        success = false;
    }
    assertTrue(success);
}
 

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
/**
 * Tests that no exceptions are thrown when there is a <code>null</code> 
 * value in the dataset.
 */
public void testNullValueInDataset() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    dataset.setValue("Section 1", 10.0);
    dataset.setValue("Section 2", 11.0);
    dataset.setValue("Section 3", null);
    JFreeChart chart = createPieChart3D(dataset);
    boolean success = false;
    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 (Throwable t) {
        success = false;
    }
    assertTrue(success);
}
 

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
/**
 * 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(), 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);
}
 

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
/**
 * Draws the chart with a null info object to make sure that no exceptions 
 * are thrown.
 */
public void testDrawWithNullInfo() {
    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    dataset.addValue(35.0, "S1", "C1");
    dataset.addValue(45.0, "S1", "C2");
    dataset.addValue(55.0, "S1", "C3");
    dataset.addValue(15.0, "S1", "C4");
    dataset.addValue(25.0, "S1", "C5");
    SpiderWebPlot plot = new SpiderWebPlot(dataset);
    JFreeChart chart = new JFreeChart(plot);
    boolean success = false;
    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);
}
 

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
/**
 * A test for bug 1654215 (where a renderer is added to the plot without
 * a corresponding dataset and it throws an exception at drawing time).
 */
public void test1654215() {
    DefaultXYDataset dataset = new DefaultXYDataset();
    JFreeChart chart = ChartFactory.createXYLineChart("Title", "X", "Y",
            dataset, PlotOrientation.VERTICAL, true, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    plot.setRenderer(1, new XYLineAndShapeRenderer());
    boolean success = false;
    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) {
        e.printStackTrace();
        success = false;
    }
    assertTrue(success);
}
 

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
/**
 * A test for drawing range grid lines when there is no primary renderer.
 * In 1.0.4, this is throwing a NullPointerException.
 */
public void testDrawRangeGridlines() {
    DefaultXYDataset dataset = new DefaultXYDataset();
    JFreeChart chart = ChartFactory.createXYLineChart("Title", "X", "Y",
            dataset, PlotOrientation.VERTICAL, true, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    plot.setRenderer(null);
    boolean success = false;
    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) {
        e.printStackTrace();
        success = false;
    }
    assertTrue(success);
}
 

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
/**
 * A test for bug 1654215 (where a renderer is added to the plot without
 * a corresponding dataset and it throws an exception at drawing time).
 */
public void test1654215() {
    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    JFreeChart chart = ChartFactory.createLineChart("Title", "X", "Y",
            dataset, PlotOrientation.VERTICAL, true, false, false);
    CategoryPlot plot = (CategoryPlot) chart.getPlot();
    plot.setRenderer(1, new LineAndShapeRenderer());
    boolean success = false;
    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) {
        e.printStackTrace();
        success = false;
    }
    assertTrue(success);
}
 

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
/**
 * A check for bug 1572478 (for the vertical orientation).
 */
public void testBug1572478Vertical() {
    DefaultBoxAndWhiskerCategoryDataset dataset 
            = new DefaultBoxAndWhiskerCategoryDataset() {
            
        public Number getQ1Value(int row, int column) {
            return null;
        }

        public Number getQ1Value(Comparable rowKey, Comparable columnKey) {
            return null;
        }
    };
    List values = new ArrayList();
    values.add(new Double(1.0));
    values.add(new Double(10.0));
    values.add(new Double(100.0));
    dataset.add(values, "row", "column");
    CategoryPlot plot = new CategoryPlot(dataset, new CategoryAxis("x"),
            new NumberAxis("y"), new BoxAndWhiskerRenderer());
    JFreeChart chart = new JFreeChart(plot);
    boolean success = false;

    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, 
                new ChartRenderingInfo());
        g2.dispose();
        success = true;
    }
    catch (Exception e) {
        success = false;
    }

    assertTrue(success);

}
 

import org.jfree.chart.JFreeChart; //导入方法依赖的package包/类
/**
 * A check for bug 1572478 (for the horizontal orientation).
 */
public void testBug1572478Horizontal() {
    DefaultBoxAndWhiskerCategoryDataset dataset 
            = new DefaultBoxAndWhiskerCategoryDataset() {
            
        public Number getQ1Value(int row, int column) {
            return null;
        }

        public Number getQ1Value(Comparable rowKey, Comparable columnKey) {
            return null;
        }
    };
    List values = new ArrayList();
    values.add(new Double(1.0));
    values.add(new Double(10.0));
    values.add(new Double(100.0));
    dataset.add(values, "row", "column");
    CategoryPlot plot = new CategoryPlot(dataset, new CategoryAxis("x"),
            new NumberAxis("y"), new BoxAndWhiskerRenderer());
    plot.setOrientation(PlotOrientation.HORIZONTAL);
    JFreeChart chart = new JFreeChart(plot);
    boolean success = false;

    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, 
                new ChartRenderingInfo());
        g2.dispose();
        success = true;
    }
    catch (Exception e) {
        success = false;
    }

    assertTrue(success);

}