xml - Export ChartFX7 to SVG in Java -

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can give example of exporting chartfx7 chart svg?

i've tried: 

    bytearrayoutputstream baos = new bytearrayoutputstream();     m_chart.setoutputwriter(new svgwriter());     m_chart.exportchart(fileformat.external, baos);
, : 
    bytearrayoutputstream baos = new bytearrayoutputstream();     m_chart.setrenderformat("svg");     m_chart.rendertostream();
both result in null pointer exception.

the following outputs xml: 

    fileoutputstream fos = new fileoutputstream(debug.getinstance().createexternalfile("chart.xml"));     m_chart.exportchart(fileformat.xml, fos);

batik libary can import java libary convert or create svg images. dont know chartfx7 standard way create svg in java.


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