Color[] colors = new Color[] { Color.RED, Color.BLUE };// 自定义
Plot.setDrawingSupplier(new DefaultDrawingSupplier(colors,
DefaultDrawingSupplier.DEFAULT_OUTLINE_PAINT_SEQUENCE,
DefaultDrawingSupplier.DEFAULT_STROKE_SEQUENCE,
DefaultDrawingSupplier.DEFAULT_OUTLINE_STROKE_SEQUENCE,
DefaultDrawingSupplier.DEFAULT_SHAPE_SEQUENCE));
Plot.setDrawingSupplier(new DefaultDrawingSupplier(colors,
DefaultDrawingSupplier.DEFAULT_OUTLINE_PAINT_SEQUENCE,
DefaultDrawingSupplier.DEFAULT_STROKE_SEQUENCE,
DefaultDrawingSupplier.DEFAULT_OUTLINE_STROKE_SEQUENCE,
DefaultDrawingSupplier.DEFAULT_SHAPE_SEQUENCE));
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Paint[] colors = ChartColor.createDefaultPaintArray();
2、改变某个或某几个
3、Plot.setDrawingSupplier(new DefaultDrawingSupplier(colors,...
import java.awt.*;
import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.*;
import org.jfree.chart.plot.*;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.ui.*;public class BarChartDemo3 extends ApplicationFrame {
static class CustomRenderer extends BarRenderer {
private Paint colors[]; public Paint getItemPaint(int i, int j) {
return colors[j % colors.length];
} public CustomRenderer(Paint apaint[]) {
colors = apaint;
}
} public BarChartDemo3(String s) {
super(s);
CategoryDataset categorydataset = createDataset();
JFreeChart jfreechart = createChart(categorydataset);
ChartPanel chartpanel = new ChartPanel(jfreechart);
chartpanel.setPreferredSize(new Dimension(500, 270));
setContentPane(chartpanel);
} private static CategoryDataset createDataset() {
double ad[][] = { { 4D, 3D, -2D, 3D, 6D } };
return DatasetUtilities.createCategoryDataset("Series ", "Category ", ad);
} private static JFreeChart createChart(CategoryDataset categorydataset) {
JFreeChart jfreechart = ChartFactory.createBarChart("Bar Chart Demo 3", "Category", "Value", categorydataset,
PlotOrientation.VERTICAL, false, true, false);
jfreechart.setBackgroundPaint(Color.lightGray);
CategoryPlot categoryplot = (CategoryPlot) jfreechart.getPlot();
categoryplot.setNoDataMessage("NO DATA!");
CustomRenderer customrenderer = new CustomRenderer(new Paint[] { Color.red, Color.blue, Color.green, Color.yellow,
Color.orange, Color.cyan, Color.magenta, Color.blue });
customrenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
customrenderer.setBaseItemLabelsVisible(true);
ItemLabelPosition itemlabelposition = new ItemLabelPosition(ItemLabelAnchor.CENTER, TextAnchor.CENTER, TextAnchor.CENTER,
45D);
customrenderer.setBasePositiveItemLabelPosition(itemlabelposition);
categoryplot.setRenderer(customrenderer);
CategoryMarker categoryer = new CategoryMarker("Category 3");
categoryer.setLabel("Special");
categoryer.setPaint(new Color(221, 255, 221, 128));
categoryer.setAlpha(0.5F);
categoryer.setLabelAnchor(RectangleAnchor.TOP_LEFT);
categoryer.setLabelTextAnchor(TextAnchor.TOP_LEFT);
categoryer.setLabelOffsetType(LengthAdjustmentType.CONTRACT);
categoryplot.addDomainMarker(categoryer, Layer.BACKGROUND);
NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
numberaxis.setLowerMargin(0.14999999999999999D);
numberaxis.setUpperMargin(0.14999999999999999D);
return jfreechart;
} public static JPanel createDemoPanel() {
JFreeChart jfreechart = createChart(createDataset());
return new ChartPanel(jfreechart);
} public static void main(String args[]) {
BarChartDemo3 barchartdemo3 = new BarChartDemo3("Bar Chart Demo 3");
barchartdemo3.pack();
RefineryUtilities.centerFrameOnScreen(barchartdemo3);
barchartdemo3.setVisible(true);
}
}