barchartdemo8.java

Jfreechart 源码例子 是和jfreechart development Guide文档相配套的

package demo;

import java.awt.Dimension;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class BarChartDemo8 extends ApplicationFrame
{
  public BarChartDemo8(String paramString)
  {
    super(paramString);
    CategoryDataset localCategoryDataset = createDataset();
    JFreeChart localJFreeChart = createChart(localCategoryDataset);
    ChartPanel localChartPanel = new ChartPanel(localJFreeChart);
    localChartPanel.setPreferredSize(new Dimension(500, 270));
    setContentPane(localChartPanel);
  }

  private static CategoryDataset createDataset()
  {
    String str1 = "First";
    String str2 = "Second";
    String str3 = "Third";
    String str4 = "Category 1";
    String str5 = "Category 2";
    String str6 = "Category 3";
    String str7 = "Category 4";
    String str8 = "Category 5";
    DefaultCategoryDataset localDefaultCategoryDataset = new DefaultCategoryDataset();
    localDefaultCategoryDataset.addValue(1D, str1, str4);
    localDefaultCategoryDataset.addValue(4.0D, str1, str5);
    localDefaultCategoryDataset.addValue(3.0D, str1, str6);
    localDefaultCategoryDataset.addValue(5.0D, str1, str7);
    localDefaultCategoryDataset.addValue(5.0D, str1, str8);
    localDefaultCategoryDataset.addValue(5.0D, str2, str4);
    localDefaultCategoryDataset.addValue(7.0D, str2, str5);
    localDefaultCategoryDataset.addValue(6.0D, str2, str6);
    localDefaultCategoryDataset.addValue(8.0D, str2, str7);
    localDefaultCategoryDataset.addValue(4.0D, str2, str8);
    localDefaultCategoryDataset.addValue(4.0D, str3, str4);
    localDefaultCategoryDataset.addValue(3.0D, str3, str5);
    localDefaultCategoryDataset.addValue(2.0D, str3, str6);
    localDefaultCategoryDataset.addValue(3.0D, str3, str7);
    localDefaultCategoryDataset.addValue(6.0D, str3, str8);
    return localDefaultCategoryDataset;
  }

  private static JFreeChart createChart(CategoryDataset paramCategoryDataset)
  {
    JFreeChart localJFreeChart = ChartFactory.createBarChart("Bar Chart Demo 8", "Category", "Value", paramCategoryDataset, PlotOrientation.VERTICAL, false, true, false);
    CategoryPlot localCategoryPlot = (CategoryPlot)localJFreeChart.getPlot();
    NumberAxis localNumberAxis = (NumberAxis)localCategoryPlot.getRangeAxis();
    localNumberAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
    localNumberAxis.setUpperMargin(0.14999999999999999D);
    CategoryItemRenderer localCategoryItemRenderer = localCategoryPlot.getRenderer();
    localCategoryItemRenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
    localCategoryItemRenderer.setSeriesItemLabelsVisible(0, Boolean.TRUE);
    CategoryAxis localCategoryAxis = localCategoryPlot.getDomainAxis();
    localCategoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
    return localJFreeChart;
  }

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

  public static void main(String[] paramArrayOfString)
  {
    BarChartDemo8 localBarChartDemo8 = new BarChartDemo8("JFreeChart: BarChartDemo8.java");
    localBarChartDemo8.pack();
    RefineryUtilities.centerFrameOnScreen(localBarChartDemo8);
    localBarChartDemo8.setVisible(true);
  }
}