I think you have two problems, one easily solved the other not.
1) (easy) You need to upgrade to Batik 1.5.1 or else call 'getGeneratorContext().setPrecision(<n>)' on the SVGGraphics2D. This will eliminate the Null Pointer Exception (NPE).
2) SVGGraphics2D doesn't support XOR mode (mostly because SVG doesn't support it). I don't believe this has anything to do with your NPE - but it might make the generated drawing "wrong". It strikes me as a little odd to be drawing something with XOR for a static picture (it's usually used for interactive stuff). If you just want a high-contrast line you may want to try drawing the path with a wide black stroke then a narrower 'white' stroke (perhaps with a dash or something).
Alice Mello Cavallo wrote:
I have an application in Java that draws a face using custom classes. [...] Below is the error message.
Error msg:
XOR Mode is not supported by Graphics2D SVG Generator
java.lang.NullPointerException
at org.apache.batik.svggen.SVGGeneratorContext.doubleString(Unknown Source)
at org.apache.batik.svggen.SVGGraphicObjectConverter.doubleString(Unknown Source)
at org.apache.batik.svggen.SVGLine.toSVG(Unknown Source)
at org.apache.batik.svggen.SVGShape.toSVG(Unknown Source)
at org.apache.batik.svggen.SVGGraphics2D.draw(Unknown Source)
at faceLL.Segment.paint(Segment.java:222)
at faceLL.Contour.paint(Contour.java:55)
at faceLL.Face.paint(Face.java:45)
at faceLL.ElasticFace$MyFrame.paint(ElasticFace.java:107)
at faceLL.ElasticFace.main(ElasticFace.java:243)
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