private void proceedNode(LocationSet set) {
    if (neighbors == null) return;
    for(int i=0; i<neighbors.length; i++) {
        Location n = neighbors[i];

        if(n.distance == Double.POSITIVE_INFINITY) {
            set.add(n);
        }

        double next = distance + distanceTo(n);

        if(next < n.distance) {
            n.distance = next;
            n.from = this;
        }
    }
}

public void findPathTo(Location to) {
    LocationSet set = new LocationSet();
    Location cur = this;

    distance = 0;
    while(cur != null && cur != to) {
        cur.proceedNode(set);
        cur = set.removeMin();
    }

    if(cur == null)
        System.out.println("Unable to find a path from " + name + " to " + to.name);
    else {
        System.out.println("Your trip from " + name + " to " + to.name + " in reverse order");
        for(cur=to; cur!=this; cur=cur.from) {
            System.out.println("  " + cur.name + " at " + cur.distance);
        }
    }
}