RE: Scale of a Xaxis NullPointerException

here is the stacktrace


java.lang.NullPointerException
render
org.jCharts.axisChart.axis.XAxis
-1
renderChart
org.jCharts.axisChart.AxisChart
-1
render
org.jCharts.Chart
-1
render
org.jCharts.encoders.BinaryEncoderUtil
-1
encode
org.jCharts.encoders.JPEGEncoder13
-1
getGraphe
com.GrapheScatter
308
main
com.EssaiGrpahe
46
null
null

i use this code for see them

System.out.println(f.getClass().getName());
             StackTraceElement stcak[]=f.getStackTrace();
             for (int t=0;t<stcak.length;t++)
             {
                  System.out.println(stcak[t].getMethodName());
                  System.out.println(stcak[t].getClassName());
                  System.out.println(stcak[t].getLineNumber());
             }
             System.out.println(f.getMessage());
             System.out.println(f.getLocalizedMessage());

>Message: 2
>Date: Wed, 01 Sep 2004 03:49:22 -0400
>From: [email protected]
>To: [email protected]
>Subject: [jCharts-users] Scale of a Xaxis NullPointerException
>Reply-To: [email protected]
>
>I don't know why i have a NullPointerException when i use the jpeg encoder
>Is there anaone could help me.....
>It is always the same problem with the scale of the xaxis on a point chart
>
>
>DataAxisProperties x=new DataAxisProperties();
>    DataAxisProperties y=new DataAxisProperties();
>    
>    
>    
>    //DataAxisProperties datatry = (DataAxisProperties)axisProperties.getXAxisProperties();
>    x.setNumItems(this.intervalle);
>    x.setUserDefinedScale(0,24);
>    x.setRoundToNearest(0);
>    
>    //DataAxisProperties dataAxisProperties= (DataAxisProperties) axisProperties.getYAxisProperties();
>    //calcul de la meilleur echelle possible
>    int n=(int)Math.ceil(new Double(String.valueOf(this.valeurMax/100)).doubleValue());
>    y.setNumItems(n+2);
>    y.setUserDefinedScale( 0, 100 );
>    y.setRoundToNearest( 0 );
> 
>    
>    AxisProperties axisProperties= new AxisProperties((LabelAxisProperties)x,y);
>    
>    //ligne pour le cadrillage
>    ChartStroke xAxisGridLines= new ChartStroke( new BasicStroke( 0.5f ), Color.GRAY );
>    axisProperties.getXAxisProperties().setGridLineChartStroke( xAxisGridLines );
>    axisProperties.getXAxisProperties().setShowGridLines( AxisTypeProperties.GRID_LINES_ONLY_WITH_LABELS);
>    axisProperties.getXAxisProperties().setShowTicks( AxisTypeProperties.TICKS_NONE );
>    axisProperties.getXAxisProperties().setPaddingBetweenAxisAndLabels(5.0f);
>   
>    
>    //generation finale
>    AxisChart axisChart= new AxisChart( dataSeries, chartProperties, axisProperties,null, 700, 500 );
>    
>   
>   // axisChart.xAxis=new XAxis(axisChart,this.intervalle);
>    
>     try{
>          JPEGEncoder13.encode(axisChart,1.0f,new FileOutputStream(prop.getProperty("GRAPHE")+chemin+".jpg"));
>            }
>
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>Message: 6
>Date: Wed, 1 Sep 2004 19:51:29 -0700 (PDT)
>From: "Nathaniel G. Auvil" <[email protected]>
>Subject: Re: [jCharts-users] Scale of a Xaxis NullPointerException
>To: [email protected]
>Reply-To: [email protected]
>
>
>can you attach the stacktrace?
>
>
>
>--- [email protected] wrote:
>
>> I don't know why i have a NullPointerException when i use the jpeg encoder
>> Is there anaone could help me.....
>> It is always the same problem with the scale of the xaxis on a point chart
>> 
>> 
>> DataAxisProperties x=new DataAxisProperties();
>>     DataAxisProperties y=new DataAxisProperties();
>>     
>>     
>>     
>>     //DataAxisProperties datatry = (DataAxisProperties)axisProperties.getXAxisProperties();
>>     x.setNumItems(this.intervalle);
>>     x.setUserDefinedScale(0,24);
>>     x.setRoundToNearest(0);
>>     
>>     //DataAxisProperties dataAxisProperties= (DataAxisProperties)
>> axisProperties.getYAxisProperties();
>>     //calcul de la meilleur echelle possible
>>     int n=(int)Math.ceil(new Double(String.valueOf(this.valeurMax/100)).doubleValue());
>>     y.setNumItems(n+2);
>>     y.setUserDefinedScale( 0, 100 );
>>     y.setRoundToNearest( 0 );
>>  
>>     
>>     AxisProperties axisProperties= new AxisProperties((LabelAxisProperties)x,y);
>>     
>>     //ligne pour le cadrillage
>>     ChartStroke xAxisGridLines= new ChartStroke( new BasicStroke( 0.5f ), Color.GRAY );
>>     axisProperties.getXAxisProperties().setGridLineChartStroke( xAxisGridLines );
>>     axisProperties.getXAxisProperties().setShowGridLines(
>> AxisTypeProperties.GRID_LINES_ONLY_WITH_LABELS);
>>     axisProperties.getXAxisProperties().setShowTicks( AxisTypeProperties.TICKS_NONE );
>>     axisProperties.getXAxisProperties().setPaddingBetweenAxisAndLabels(5.0f);
>>    
>>     
>>     //generation finale
>>     AxisChart axisChart= new AxisChart( dataSeries, chartProperties, axisProperties,null, 700,
>> 500 );
>>     
>>    
>>    // axisChart.xAxis=new XAxis(axisChart,this.intervalle);
>>     
>>      try{
>>           JPEGEncoder13.encode(axisChart,1.0f,new
>> FileOutputStream(prop.getProperty("GRAPHE")+chemin+".jpg"));
>>             }
>> 
>> __________________________________________________________________
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>
>
>
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