无法在java swing中映射图像

我有一个名为ImageMapDemo7的类，我想用此程序映射图像但出错。我有全包，有没有SampleXYDataset2 class jfree chart还是不行？无法在java swing中映射图像

我的代码是：

import java.io.BufferedOutputStream; 
import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.OutputStream; 
import java.io.PrintWriter; 

import org.jfree.chart.ChartFactory; 
import org.jfree.chart.ChartRenderingInfo; 
import org.jfree.chart.ChartUtilities; 
import org.jfree.chart.JFreeChart; 
import org.jfree.chart.axis.NumberAxis; 
import org.jfree.chart.entity.StandardEntityCollection; 
import org.jfree.chart.plot.PlotOrientation; 
import org.jfree.data.xy.XYDataset; 

/** 
* A demo showing how to create an HTML image map for a scatter plot. 
* 
*/ 
public class ImageMapDemo7 { 

    /** 
    * Default constructor. 
    */ 
    public ImageMapDemo7() { 
     super(); 
    } 


    public static void main(final String[] args) { 

     final XYDataset data = new SampleXYDataset2(); 
     final JFreeChart chart = ChartFactory.createScatterPlot(
      "Scatter Plot Demo", 
      "X", "Y", 
      data, 
      PlotOrientation.VERTICAL, 
      true, 
      true, 
      false 
     ); 
//  final NumberAxis domainAxis = (NumberAxis) chart.getXYPlot().getDomainAxis(); 
     domainAxis.setAutoRangeIncludesZero(false); 
     chart.setBackgroundPaint(java.awt.Color.white); 

     // save it to an image 

     try { 
      final ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection()); 
      final File file1 = new File("image1.jpg"); 
      ChartUtilities.saveChartAsPNG(file1, chart, 600, 400, info); 

      // write an HTML page incorporating the image with an image map 
      final File file2 = new File("scatter100.html"); 
      final OutputStream out = new BufferedOutputStream(new FileOutputStream(file2)); 
      final PrintWriter writer = new PrintWriter(out); 
      writer.println("<HTML>"); 
      writer.println("<HEAD><TITLE>JFreeChart Image Map Demo</TITLE></HEAD>"); 
      writer.println("<BODY>"); 
//   ChartUtilities.writeImageMap(writer, "chart", info); 
      writer.println("<IMG SRC=\"image1.jpg\" " 
          + "WIDTH=\"600\" HEIGHT=\"400\" BORDER=\"0\" USEMAP=\"#chart\">"); 
      writer.println("</BODY>"); 
      writer.println("</HTML>"); 
      writer.close(); 

     } 
     catch (IOException e) { 
      System.out.println(e.toString()); 
     } 

    } 

}

错误是：

ImageMapDemo7.java:37: error: cannot find symbol 
     final XYDataset data = new SampleXYDataset2(); 
           ^
    symbol: class SampleXYDataset2 
    location: class ImageMapDemo7

来源

2013-10-19 Manoj Gupta

Import missing？ –

但该类不存在... –

您需要添加的JFreeChart-1.0.1-Demo.jar文件在类路径中。应该添加导入语句。罐子可以从这里下载link

来源

2013-10-19 09:18:32 Keerthivasan

无法在java swing中映射图像

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