Re:

[Yoann Pigné <yoann.pigne AT gmail.com>]

You can use Node#hasEdgeBetween before adding need edges. This will tell you 
if an edge already exists between 2 nodes. 

https://data.graphstream-project.org/api/gs-core/1.3/org/graphstream/graph/Node.html#hasEdgeBetween(java.lang.String)


> Le 29 oct. 2016 à 18:41, 
> <yasirarfat081 AT gmail.com>
>  
> <yasirarfat081 AT gmail.com>
>  a écrit :
> 
> I have a text file as follows:
> 1    3
> 2    5
> 3    6
> 4    5
> 5    4
> 6    1
> 7    2
> The above file represents the edges in an undirected graph. I want to remove
> the duplicate edges in the graph. In the above given example I want to 
> remove
> either 4,5 or 5,4 as they represent the same edge in graph and hence causes
> duplication. I am trying to visualize the graph from the file using 
> Graphstream
> using the GraphX library in Apache Spark. But due to the presence of 
> duplicate
> nodes as explained above it gives an error as follows:
> org.graphstream.graph.EdgeRejectedException: Edge 4[5--4] was rejected by 
> node
> 5
> What would be the best way to remove such duplicates from the text file?