java - Get set of edges -


i seem have problem using/understanding sets. in jgrapht there function edgeset(). store edges in array, did this:

defaultweightededge edgescontained[]= (defaultweightededge[]) graph.edgeset().toarray(); //compiler returns line 1 error     ( int i=0; i<=numberofedges; i++) {     setrandomweight(edgescontained[i], randomweight());     }

but output is

exception in thread "main" java.lang.classcastexception: [ljava.lang.object; cannot cast [lorg.jgrapht.graph.defaultweightededge;

why , how should properly?

graph.edgeset().toarray() return object[], cannot cast defaultweightededge[]. instead use graph.edgeset().toarray(new defaultweightededge[0]).


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