Re: [jCharts-users] Scale of a Xaxis NullPointerException

[Nathaniel G. A. <nat...@ya...>]

can you attach the stacktrace?



--- jle...@ne... 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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