Even the example didn't work? about jmathplot

[isnopitag]

Well for the error of the icons download this .jar
and dont forget to include jmathio.jar https://github.com/yannrichet/jmathio

Link for the new jar ✌️
http://www.mediafire.com/download/wa3g3jfs6hv6aif/jmathplot.jar
Sorry for the mediafire link, I still no0b on Github ✌️

[wamson]

I have the same problem as "skipperguy12".
Exception in thread "main" java.lang.NullPointerException
at javax.swing.ImageIcon.(ImageIcon.java:217)
at org.math.plot.components.PlotToolBar.(PlotToolBar.java:61)
at org.math.plot.PlotPanel.addPlotToolBar(PlotPanel.java:149)
at org.math.plot.PlotPanel.(PlotPanel.java:59)
at org.math.plot.PlotPanel.(PlotPanel.java:67)
at org.math.plot.Plot2DPanel.(Plot2DPanel.java:31)
at online.InitialData.plotData(InitialData.java:15)
at online.TestGradDescent.main(TestGradDescent.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)

[intfrr]

You have to include jmathio.jar https://github.com/yannrichet/jmathio

Note. Even this fix won't work; you will have to recreate the jar with icons folder from the source.

[wamson]

Oh, how to recreate the jar with icons folder from the source?

[skipperguy12]

I'm sure this is related to me not "recreating the jar with icons folder from the source".
I have this issue (after including jmathio as a maven dependency).

Exception in thread "main" java.lang.NullPointerException
    at javax.swing.ImageIcon.<init>(ImageIcon.java:217)
    at org.math.plot.components.PlotToolBar.<init>(PlotToolBar.java:61)
    at org.math.plot.PlotPanel.addPlotToolBar(PlotPanel.java:149)
    at org.math.plot.PlotPanel.<init>(PlotPanel.java:59)
    at org.math.plot.PlotPanel.<init>(PlotPanel.java:67)
    at org.math.plot.Plot2DPanel.<init>(Plot2DPanel.java:31)
    at online.InitialData.plotData(InitialData.java:15)
    at online.TestGradDescent.main(TestGradDescent.java:10)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)

Please explain how I can fix this. Thanks!

[yannrichet]

might be due to maven, not copying .png files in the jar, unlike ant. Probably need to move .png files in the src/main/resources/... directory. Let me some time to check that.

[yannrichet]

fixed in last push.

[PaulojsGoncalves]

I place last version of jmathplot.jar with fix #16 into libraries of my project using Netbeans IDE. The method Plot2DPanel was now recognized but when I run project next exception was thrown:

Exception in thread "main" java.lang.NullPointerException
at javax.swing.ImageIcon.(ImageIcon.java:217)
at org.math.plot.components.PlotToolBar.(PlotToolBar.java:61)
at org.math.plot.PlotPanel.addPlotToolBar(PlotPanel.java:149)
at org.math.plot.PlotPanel.(PlotPanel.java:59)
at org.math.plot.PlotPanel.(PlotPanel.java:67)
at org.math.plot.Plot2DPanel.(Plot2DPanel.java:31)
at runningactivitiesannalyser.PlotRunningData.plotgraph(PlotRunningData.java:38)
at runningactivitiesannalyser.RunningActivitiesAnnalyser.main(RunningActivitiesAnnalyser.java:55)
Java Result: 1

How can I solve the problem and use this method?

Thank you!

[yannrichet]

Could you please check that .png files are located inside the jar file ?
Thx

[PaulojsGoncalves]

There are no .png files inside jar fie. Only java classes can be found into jar.

[wamson]

oh, I put the latest source file into eclipse and export them as Jar. And then it works.

[yannrichet]

Ok, so I expect it is ok now. For those who still have problems, please cleanup your jar and rebuild from scratch.

[rayryeng]

@isnopitag Cheers. I didn't want to rebuild the source again. Thanks so much for making the JAR available!

[rodanmuro]

I have the same problem
Exception in thread "main" java.lang.NullPointerException
at javax.swing.ImageIcon.(ImageIcon.java:217)
at org.math.plot.components.PlotToolBar.(PlotToolBar.java:61)
at org.math.plot.PlotPanel.addPlotToolBar(PlotPanel.java:149)
at org.math.plot.PlotPanel.(PlotPanel.java:59)
at org.math.plot.PlotPanel.(PlotPanel.java:67)
at org.math.plot.Plot2DPanel.(Plot2DPanel.java:31)
at graficasjava.GraficasJava.main(GraficasJava.java:21)
I download the last .jar and nothing
Any help? Thanks