jfreechart 柱状图显示

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jfreechart 柱状图显示5

柱状图显示可以显示数字，，如何显示百分数呢？？

jfreechart 柱状图百分比显示数字

2013年8月23日 10:54

jiekou0704
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3个答案按时间排序按投票排序

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import java.awt.Color;
import java.awt.Dimension;
import java.awt.Paint;
import java.text.DecimalFormat;
import java.text.NumberFormat;

import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.TextAnchor;

public class BarChartDemo1 extends ApplicationFrame {
	static class CustomBarRenderer3D extends BarRenderer3D {
		public Paint getItemPaint(int i, int j) {
			CategoryDataset categorydataset = getPlot().getDataset();
			double d = categorydataset.getValue(i, j).doubleValue();
			if (d >= 0.69999999999999996D)
				return Color.green;
			else
				return Color.red;
		}

		public CustomBarRenderer3D() {
		}
	}

	public BarChartDemo1(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() {
		DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
		defaultcategorydataset.addValue(0.77000000000000002D, "Series 1",
				"Robert");
		defaultcategorydataset.addValue(0.93000000000000005D, "Series 2",
				"Robert");// +"Mary"
		defaultcategorydataset.addValue(0.58999999999999997D, "Series 1",
				"John");
		defaultcategorydataset.addValue(0.75D, "Series 1", "Ellen");
		defaultcategorydataset.addValue(0.63D, "Series 1", "Jack");
		defaultcategorydataset.addValue(0.94999999999999996D, "Series 1",
				"David");
		defaultcategorydataset.addValue(0.70999999999999996D, "Series 1",
				"Mark");
		defaultcategorydataset.addValue(0.65000000000000002D, "Series 1",
				"Andy");
		return defaultcategorydataset;
	}

	private static JFreeChart createChart(CategoryDataset categorydataset) {
		JFreeChart jfreechart = ChartFactory.createBarChart3D("Student Grades",
				"Students", "Grade", categorydataset, PlotOrientation.VERTICAL,
				false, true, false);
		CategoryPlot categoryplot = (CategoryPlot) jfreechart.getPlot();
		CustomBarRenderer3D custombarrenderer3d = new CustomBarRenderer3D();
		DecimalFormat df = new DecimalFormat("0.00%");
		custombarrenderer3d
				.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator(
						"{2}", df));
		custombarrenderer3d.setItemLabelAnchorOffset(10D);
		custombarrenderer3d
				.setBasePositiveItemLabelPosition(new ItemLabelPosition(
						ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
		categoryplot.setRenderer(custombarrenderer3d);

		custombarrenderer3d.setBaseItemLabelsVisible(true);
		custombarrenderer3d.setMaximumBarWidth(0.050000000000000003D);

		NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
		numberaxis.setNumberFormatOverride(NumberFormat.getPercentInstance());
		numberaxis.setUpperMargin(0.10000000000000001D);
		return jfreechart;
	}

	public static JPanel createDemoPanel() {
		JFreeChart jfreechart = createChart(createDataset());
		return new ChartPanel(jfreechart);
	}

	public static void main(String args[]) {
		BarChartDemo1 barchart3ddemo4 = new BarChartDemo1("3D Bar Chart Demo 1");
		barchart3ddemo4.pack();
		RefineryUtilities.centerFrameOnScreen(barchart3ddemo4);
		barchart3ddemo4.setVisible(true);
	}
}

2013年8月23日 14:33