diff --git a/brouter-core/src/main/java/btools/router/RoutingEngine.java b/brouter-core/src/main/java/btools/router/RoutingEngine.java
index 66addd0..4dbee89 100644
--- a/brouter-core/src/main/java/btools/router/RoutingEngine.java
+++ b/brouter-core/src/main/java/btools/router/RoutingEngine.java
@@ -670,21 +670,21 @@ public class RoutingEngine extends Thread {
 
     switch (preferredRandomType) {
       case AreaInfo.RESULT_TYPE_ELEV50:
-        Collections.sort(ais, new Comparator<AreaInfo>() {
+        Collections.sort(ais, new Comparator<>() {
           public int compare(AreaInfo o1, AreaInfo o2) {
             return o2.getElev50Weight() - o1.getElev50Weight();
           }
         });
         break;
       case AreaInfo.RESULT_TYPE_GREEN:
-        Collections.sort(ais, new Comparator<AreaInfo>() {
+        Collections.sort(ais, new Comparator<>() {
           public int compare(AreaInfo o1, AreaInfo o2) {
             return o2.getGreen() - o1.getGreen();
           }
         });
         break;
       case AreaInfo.RESULT_TYPE_RIVER:
-        Collections.sort(ais, new Comparator<AreaInfo>() {
+        Collections.sort(ais, new Comparator<>() {
           public int compare(AreaInfo o1, AreaInfo o2) {
             return o2.getRiver() - o1.getRiver();
           }