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Re: Exception thrown in graphstream

Chronologique Discussions 
  • From: Chris Saltmarsh <indy.maturin AT>
  • To: cedric.herpson AT
  • Cc: graphstream-users AT, Mikael Wallin <mikael.x.wallin AT>, Frederic Guinand <frederic.guinand AT>
  • Subject: Re: Exception thrown in graphstream
  • Date: Mon, 25 Oct 2021 05:35:44 +0100
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Just to say: I had this problem; applied the debug flag but that didn't fix it. Ameliorated, but not completely stopped. As it wasn't a biggy, I shifted to swing. I may have to get to FX again as I expand what I need gstream to do. 
Bonne chance, and keep in touch if you want to.

Chris Saltmarsh

On Mon, 25 Oct 2021 at 05:27, Cédric Herpson <cedric.herpson AT> wrote:


Assuming you use JavaFx (System.setProperty("org.graphstream.ui", "javafx");) , just add


before calling new Singlegraph()

and everything will be ok. It is required on some systems to allow time for the interface to be created, otherwise it generates a bug.

See FxViewer.class line 215 if you wanna understand it precisely.

I agree it should be added in the tutorial, or corrected.

Best wishes.


Cédric Herpson (MdC)
Sorbonne Université - CNRS | LIP6 - SMA
4 Place Jussieu 75252 Paris - BC 169 | Office 25-26/402
(+33) |
twt: @herpsonc

Le 24/10/2021 à 22:18, Mikael Wallin a écrit :
Hi Frederic 

Sorry, your mail hid in my spam folder :) didn't see it until now.

This tutorial with A, B and C nodes.

It seems I am not the only one, there is another person reporting the same error so he created his own Scene to work around it.

I tried with java 8 to 16, and same exception is thrown when running graph.display();

kind regards

Mikael Wallin

On Wed, 20 Oct 2021 at 14:53, Frederic Guinand <frederic.guinand AT> wrote:

Can you give some details? Which example in the tutorial?



Le 17/10/2021 à 18:42, mikael.x.wallin AT a écrit :
> I wrote the example in the tutorial and got:
> Cannot invoke "" because "this.pulseTimer" is
> null

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