From d55c080feebbc5654d724f136527d44f8b7cc222 Mon Sep 17 00:00:00 2001
From: oblonski <jsprit.vehicle.routing@gmail.com>
Date: Fri, 1 Apr 2016 10:05:53 +0200
Subject: [PATCH] make set a LinkedHashSet to further improve reproducibility

---
 .../jsprit/core/problem/VehicleRoutingProblem.java            | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/problem/VehicleRoutingProblem.java b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/problem/VehicleRoutingProblem.java
index 1f6a0b30..645595dd 100644
--- a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/problem/VehicleRoutingProblem.java
+++ b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/problem/VehicleRoutingProblem.java
@@ -88,9 +88,9 @@ public class VehicleRoutingProblem {
 
         private Collection<VehicleRoute> initialRoutes = new ArrayList<VehicleRoute>();
 
-        private Set<Vehicle> uniqueVehicles = new HashSet<Vehicle>();
+        private Set<Vehicle> uniqueVehicles = new LinkedHashSet<Vehicle>();
 
-        private Set<String> addedVehicleIds = new HashSet<String>();
+        private Set<String> addedVehicleIds = new LinkedHashSet<String>();
 
         private boolean hasBreaks = false;