how to use jcharts ?

hi:

  i just install the demo with tomcat, it's can display the http://127.0.0.1:8080/jChartsServletExamples/index.html 

  but when i change the code, i reload the pages in brower, it's don't display the changes.

  i want to compile the PieChart2DServlet.java

  but when i use the command:
javac org\jCharts\demo\simpleServlet\PieChart2DServlet.java

  it's tell me 18 errors

  this is the errors info:

org\jCharts\demo\simpleServlet\PieChart2DServlet.java:43: package org.jCharts.chartData does not exist
import org.jCharts.chartData.ChartDataException;
                             ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:44: package org.jCharts.chartData does not exist
import org.jCharts.chartData.PieChartDataSet;
                             ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:45: package org.jCharts.encoders does not exist
import org.jCharts.encoders.ServletEncoderHelper;
                            ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:46: package org.jCharts.nonAxisChart does not exist
import org.jCharts.nonAxisChart.PieChart2D;
                                ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:47: package org.jCharts.properties does not exist
import org.jCharts.properties.*;
^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:58: cannot resolve symbol
symbol  : class PieChart2DProperties
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
        private PieChart2DProperties properties;
                ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:59: cannot resolve symbol
symbol  : class LegendProperties
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
        private LegendProperties legendProperties;
                ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:60: cannot resolve symbol
symbol  : class ChartProperties
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
        private ChartProperties chartProperties;
                ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:105: cannot resolve symbol
symbol  : class PieChartDataSet
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
        private PieChartDataSet getData() throws ChartDataException
                ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:105: cannot resolve symbol
symbol  : class ChartDataException
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
        private PieChartDataSet getData() throws ChartDataException
                                                 ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:72: cannot resolve symbol
symbol  : class PieChart2DProperties
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
                this.properties = new PieChart2DProperties();
                                      ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:74: cannot resolve symbol
symbol  : class LegendProperties
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
                this.legendProperties = new LegendProperties();
                                            ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:76: cannot resolve symbol
symbol  : variable LegendProperties
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
                this.legendProperties.setPlacement( LegendProperties.RIGHT );
                                                    ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:78: cannot resolve symbol
symbol  : class ChartProperties
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
                this.chartProperties = new ChartProperties();
                                           ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:89: cannot resolve symbol
symbol  : class PieChart2D
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
                        PieChart2D pieChart2D = new PieChart2D( this.getData(), this.legendProperties, this.chartProperties, thi
s.width, this.height );
                        ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:89: cannot resolve symbol
symbol  : class PieChart2D
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
                        PieChart2D pieChart2D = new PieChart2D( this.getData(), this.legendProperties, this.chartProperties, thi
s.width, this.height );
                                                    ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:90: cannot resolve symbol
symbol  : variable ServletEncoderHelper
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
                        ServletEncoderHelper.encodeJPEG13( pieChart2D, 1.0f, response );
                        ^
org\jCharts\demo\simpleServlet\PieChart2DServlet.java:110: cannot resolve symbol
symbol  : class PieChartDataSet
location: class org.jCharts.demo.simpleServlet.PieChart2DServlet
                return new PieChartDataSet( "Cars That Own!", data, labels, paints, this.properties );
                           ^
18 errors
==============================

how can i do with it?

many thanks!



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