{

public static void main(String[] args)

{

// If you want to check your gremlin version, uncomment the following line

//System.out.println("Gremlin version is " + Gremlin.version());

// Create a new TinkerGraph instance and try to load the air-routes data

TinkerGraph tg = TinkerGraph.open() ;

try

{

tg.io(IoCore.graphml()).readGraph("air-routes.graphml");

}

catch( IOException e )

{

System.out.println("TinkerGraphTest - Air routes GraphML file not found");

System.exit(0);

}

// Create our graph traversal source

GraphTraversalSource g = tg.traversal();

// Run a few simple tests

// Get a value map for the properties associated with the AUS airport

Map<String,?> aus = g.V().has("code","AUS").valueMap().next();

System.out.println(aus);

// Which city is the AUS airport located in?

List city = (List)(aus.get("city"));

System.out.println("\nThe AUS airport is in " + city.get(0) + "\n");

// Display the property keys and values

aus.forEach( (k,v) -> System.out.println(k + ": "+ v));

// How many routes are there from DFW?

Long n = g.V().has("code","DFW").out().count().next();

System.out.println("\nThere are " + n + " routes from Dallas\n");

// Where do the routes go to?

List fromDfw = g.V().has("code","DFW").out().values("code").toList();

System.out.println(fromDfw);

// Where in the USA can I fly to from LHR?

List <Path> lhrToUsa = g.V().has("code","LHR").outE().inV().

has("country","US").

path().by("code").by("dist").toList();

System.out.println("\nRoutes from LHR to the USA\n");

lhrToUsa.forEach((k) -> System.out.println(k));

// If I start in AUS, and only stop once on the way, where in

// England can I get to? Note the use of "__." to prefix the

// call to the out() step.

List <Object> eng =

g.V().has("code","AUS").repeat(__.out()).times(2).

has("region","GB-ENG").values("city").dedup().toList();

System.out.println("\nPlaces in England I can get to with one stop from AUS.\n");

eng.forEach( (p) -> System.out.print(p + " "));

System.out.println();

}