文字列と二重のJFreechart

Question

私は、X軸に対応するdouble値を含むdbとY軸の文字列を含むJFreeChart XYグラフを作成しようとしています。

私はインターネット上のさまざまな例を繰り返してきましたが、実際の例は見つかりません。

私は何かを知っている人がいますか？

Answer 1

このコードは、IDEのコードを過ぎて実行するのに役立ちます。

import java.awt.Color; 
import java.awt.GradientPaint; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import org.jfree.chart.ChartFactory; 
import org.jfree.chart.ChartUtilities; 
import org.jfree.chart.JFreeChart; 
import org.jfree.chart.axis.NumberAxis; 
import org.jfree.chart.plot.CategoryPlot; 
import org.jfree.chart.plot.PlotOrientation; 
import org.jfree.chart.renderer.BarRenderer; 
import org.jfree.data.CategoryDataset; 
import org.jfree.data.DefaultCategoryDataset; 

/** 
* 
* 
*/ 
public class BarChart { 

    /** 
    * Returns a sample dataset. 
    * 
    * @return The dataset. 
    */ 
    private CategoryDataset createDataset() { 
     // row keys... 
     String series1 = "First"; 
     String series2 = "Second"; 
     String series3 = "Third"; 
     // column keys... 
     String category1 = "Category 1"; 
     String category2 = "Category 2"; 
     String category3 = "Category 3"; 
     String category4 = "Category 4"; 
     String category5 = "Category 5"; 
     // create the dataset... 
     DefaultCategoryDataset dataset = new DefaultCategoryDataset(); 
     dataset.addValue(1.0, series1, category1); 
     dataset.addValue(4.0, series1, category2); 
     dataset.addValue(3.0, series1, category3); 
     dataset.addValue(5.0, series1, category4); 
     dataset.addValue(5.0, series1, category5); 
     dataset.addValue(5.0, series2, category1); 
     dataset.addValue(7.0, series2, category2); 
     dataset.addValue(6.0, series2, category3); 
     dataset.addValue(8.0, series2, category4); 
     dataset.addValue(4.0, series2, category5); 
     dataset.addValue(4.0, series3, category1); 
     dataset.addValue(3.0, series3, category2); 
     dataset.addValue(2.0, series3, category3); 
     dataset.addValue(3.0, series3, category4); 
     dataset.addValue(6.0, series3, category5); 
     return dataset; 
    } 

    public static void main(String[] args) { 
     String path = System.getProperty("user.dir") + "\\"; 
     BarChart bc = new BarChart(); 
     // create the chart... 
     JFreeChart chart = bc.createChart(bc.createDataset()); 
     FileOutputStream out = null; 
     try { 
      out = new FileOutputStream(path + "jfreechartimg.jpeg"); 
      ChartUtilities.writeChartAsJPEG(out, chart, 600, 400); 
     } catch (IOException iOException) { 
     } finally { 
      try{out.close();}catch(Exception ignore){} 
     } 
     System.out.println("finished !"); 
    } 

    /** 
    * Creates a sample chart. 
    * 
    * @param dataset the dataset. 
    * 
    * @return The chart. 
    */ 
    private JFreeChart createChart(CategoryDataset dataset) { 
     // create the chart... 
     JFreeChart chart = ChartFactory.createBarChart(
       "Bar Chart Demo for Mr P.", // chart title 
       "Category", // domain axis label 
       "Value", // range axis label 
       dataset, // data 
       PlotOrientation.VERTICAL, 
       true, // include legend 
       true, // tooltips? 
       false // URLs? 
       ); 
     // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART... 
     // set the background color for the chart... 
     chart.setBackgroundPaint(new Color(255,255,91)); 
     // get a reference to the plot for further customisation... 
     CategoryPlot plot = chart.getCategoryPlot(); 
     // set the range axis to display integers only... 
     NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); 
     rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); 
     // disable bar outlines... 
     BarRenderer renderer = (BarRenderer) plot.getRenderer(); 
     renderer.setDrawBarOutline(false); 
     // set up gradient paints for series... 
     GradientPaint gp0 = new GradientPaint(
       0.0f, 0.0f, new Color(161,29,33), 
       0.0f, 0.0f, new Color(249,175,154)); 
     GradientPaint gp1 = new GradientPaint(
       0.0f, 0.0f, new Color(0,108,56), 
       0.0f, 0.0f, new Color(119,193,88)); 
     GradientPaint gp2 = new GradientPaint(
       0.0f, 0.0f, new Color(35,65,139), 
       0.0f, 0.0f, new Color(185,219,243)); 
     renderer.setSeriesPaint(0, gp0); 
     renderer.setSeriesPaint(1, gp1); 
     renderer.setSeriesPaint(2, gp2); 

     return chart; 
    } 
} 

コードの出力：

Answer 2

あなたはこのためにSymbolAxisを使用することができます。

を参照してください：x軸上の "文字列" について How can I change the tickLabel on a NumberAxis in JFreeChart?