This mailing list is geared to address issues regarding the Netbeans
application and perhaps not the right place to procure answers regarding
software programming problems. I suggest, using sites like stackoverflow,
Github, coderanch, etc. where an abundance of contributions are available from
developers worldwide and you have much better chance in getting an answer.
Although a cursory glance at the stack trace indicates the exception is in Java
FX native code (event handling in this case) but in reality such problem stems
from an uninitialized setup or a configuration in your Java code that
propegates into the lower libraries.
Best,hrh
On Thursday, November 12, 2020, 8:23:10 PM GMT+3:30, Chris Olsen
<[email protected]> wrote:
Hello, Everyone --
I am faced with a bit of difficulty tracking down a null pointer. I am only
slightly experienced with Exceptions, but thus far I seem to have been
relatively successful at using them in my code. However, my new problem is
that I cannot connect the null pointer exception to any of my code. I believe
I have the error surrounded by the try-catch block, but the stack trace seems
to me to be only telling me about deep down in java code. I have printed part
of the stack trace below. In the actual run, this is repeated, as more than
one Mouse Dragging event is being detected. The first three lines are just
System.outs of my code line numbers.
I tried using the Netbeans debugger (which I am not at all familiar with) and
got the same output.
Any suggestions for how I might approach this error detection are much
appreciated!
-- Chris
-----------------------------------------------------------
190 ----- DragableAnchorPane, begin resizeViaMouse(MouseEvent event)
195 -----===== state = S_RESIZE
243 ----- DragableAnchorPane, end resizeViaMouse(MouseEvent event)
java.lang.NullPointerException
at
javafx.graphics/com.sun.javafx.sg.prism.NGCanvas$RenderBuf.validate(NGCanvas.java:214)
at
javafx.graphics/com.sun.javafx.sg.prism.NGCanvas.initCanvas(NGCanvas.java:644)
at
javafx.graphics/com.sun.javafx.sg.prism.NGCanvas.renderContent(NGCanvas.java:607)
at javafx.graphics/com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
at javafx.graphics/com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
at
javafx.graphics/com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
at
javafx.graphics/com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:578)
at javafx.graphics/com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
at javafx.graphics/com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
at
javafx.graphics/com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
at
javafx.graphics/com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:578)
at javafx.graphics/com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
at javafx.graphics/com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
at
javafx.graphics/com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
at
javafx.graphics/com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:578)
at javafx.graphics/com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
at javafx.graphics/com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
at
javafx.graphics/com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
at
javafx.graphics/com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:578)
at javafx.graphics/com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
at javafx.graphics/com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
at
javafx.graphics/com.sun.javafx.tk.quantum.ViewPainter.doPaint(ViewPainter.java:479)
at
javafx.graphics/com.sun.javafx.tk.quantum.ViewPainter.paintImpl(ViewPainter.java:328)
at
javafx.graphics/com.sun.javafx.tk.quantum.PresentingPainter.run(PresentingPainter.java:91)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at
java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
at javafx.graphics/com.sun.javafx.tk.RenderJob.run(RenderJob.java:58)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at
javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:125)
at java.base/java.lang.Thread.run(Thread.java:832)
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