when i try to run TraversalExample.java example and create the graph like
this
it give me error like this
Exception in thread "main" java.lang.NullPointerException
at setupneo4j.TraversalExample.<init>(TraversalExample.java:23)
at setupneo4j.TraversalExample.main(TraversalExample.java:33)
what is the problems here.
public static void main( String[] args )
{
TraversalExample op = new TraversalExample( db );
op.shutdownGraph();
}
public void shutdownGraph()
{
try
{
if ( db != null )
{
db.shutdown();
}
}
finally
{
db = null;
}
}
public Node createTheGraph()
{
try ( Transaction tx = db.beginTx() )
{
// START SNIPPET: createGraph
Node A = db.createNode();
Node B = db.createNode();
Node C = db.createNode();
Node D = db.createNode();
A.createRelationshipTo( C, Rels.KNOWS );
C.createRelationshipTo( D, Rels.KNOWS );
A.createRelationshipTo( B, Rels.KNOWS);
B.createRelationshipTo( C, Rels.KNOWS );
// END SNIPPET: createGraph
A.setProperty( "name", "A" );
B.setProperty( "name", "B" );
C.setProperty( "name", "C" );
D.setProperty( "name", "D" );
tx.success();
return A;
}
}
--
You received this message because you are subscribed to the Google Groups
"Neo4j" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
