public boolean findRouteDFS(GraphNode<Integer> n1, GraphNode<Integer> n2) {
n1.setVisited(true);
for (GraphNode<Integer> node : n1.getSucc()) {
if (node == n2) {
return true;
}
if (node.isVisited() == false) {
return findRouteDFS(node, n2);
}
}
return false;
}
