diff --git a/brouter-codec/src/main/java/btools/codec/MicroCache2.java b/brouter-codec/src/main/java/btools/codec/MicroCache2.java
index bf7891e..21aa5c2 100644
--- a/brouter-codec/src/main/java/btools/codec/MicroCache2.java
+++ b/brouter-codec/src/main/java/btools/codec/MicroCache2.java
@@ -287,7 +287,7 @@ public final class MicroCache2 extends MicroCache {
 
   @Override
   public int encodeMicroCache(byte[] buffer) {
-    HashMap<Long, Integer> idMap = new HashMap<Long, Integer>();
+    HashMap<Long, Integer> idMap = new HashMap<>();
     for (int n = 0; n < size; n++) { // loop over nodes
       idMap.put(Long.valueOf(expandId(faid[n])), Integer.valueOf(n));
     }
diff --git a/brouter-codec/src/main/java/btools/codec/StatCoderContext.java b/brouter-codec/src/main/java/btools/codec/StatCoderContext.java
index ca5f08a..c0254f7 100644
--- a/brouter-codec/src/main/java/btools/codec/StatCoderContext.java
+++ b/brouter-codec/src/main/java/btools/codec/StatCoderContext.java
@@ -39,7 +39,7 @@ public final class StatCoderContext extends BitCoderContext {
   public void assignBits(String name) {
     long bitpos = getWritingBitPosition();
     if (statsPerName == null) {
-      statsPerName = new TreeMap<String, long[]>();
+      statsPerName = new TreeMap<>();
     }
     long[] stats = statsPerName.get(name);
     if (stats == null) {
diff --git a/brouter-codec/src/main/java/btools/codec/TagValueCoder.java b/brouter-codec/src/main/java/btools/codec/TagValueCoder.java
index e8e3235..098ea06 100644
--- a/brouter-codec/src/main/java/btools/codec/TagValueCoder.java
+++ b/brouter-codec/src/main/java/btools/codec/TagValueCoder.java
@@ -58,7 +58,7 @@ public final class TagValueCoder {
         TagValueSet dummy = new TagValueSet(nextTagValueSetId++);
         identityMap.put(dummy, dummy);
       }
-      PriorityQueue<TagValueSet> queue = new PriorityQueue<TagValueSet>(2 * identityMap.size(), new TagValueSet.FrequencyComparator());
+      PriorityQueue<TagValueSet> queue = new PriorityQueue<>(2 * identityMap.size(), new TagValueSet.FrequencyComparator());
       queue.addAll(identityMap.values());
       while (queue.size() > 1) {
         TagValueSet node = new TagValueSet(nextTagValueSetId++);
@@ -79,7 +79,7 @@ public final class TagValueCoder {
   }
 
   public TagValueCoder() {
-    identityMap = new HashMap<TagValueSet, TagValueSet>();
+    identityMap = new HashMap<>();
   }
 
   private Object decodeTree(BitCoderContext bc, DataBuffers buffers, TagValueValidator validator) {
diff --git a/brouter-core/src/main/java/btools/router/OsmNogoPolygon.java b/brouter-core/src/main/java/btools/router/OsmNogoPolygon.java
index 84663a3..ea828fe 100644
--- a/brouter-core/src/main/java/btools/router/OsmNogoPolygon.java
+++ b/brouter-core/src/main/java/btools/router/OsmNogoPolygon.java
@@ -24,7 +24,7 @@ public class OsmNogoPolygon extends OsmNodeNamed {
     }
   }
 
-  public final List<Point> points = new ArrayList<Point>();
+  public final List<Point> points = new ArrayList<>();
 
   public final boolean isClosed;
 
diff --git a/brouter-core/src/main/java/btools/router/OsmTrack.java b/brouter-core/src/main/java/btools/router/OsmTrack.java
index c8fbed6..4d8da0d 100644
--- a/brouter-core/src/main/java/btools/router/OsmTrack.java
+++ b/brouter-core/src/main/java/btools/router/OsmTrack.java
@@ -53,14 +53,14 @@ public final class OsmTrack {
 
   public Map<String, String> params;
 
-  public List<OsmNodeNamed> pois = new ArrayList<OsmNodeNamed>();
+  public List<OsmNodeNamed> pois = new ArrayList<>();
 
   public static class OsmPathElementHolder {
     public OsmPathElement node;
     public OsmPathElementHolder nextHolder;
   }
 
-  public List<OsmPathElement> nodes = new ArrayList<OsmPathElement>();
+  public List<OsmPathElement> nodes = new ArrayList<>();
 
   private CompactLongMap<OsmPathElementHolder> nodesMap;
 
@@ -82,7 +82,7 @@ public final class OsmTrack {
 
   public void registerDetourForId(long id, OsmPathElement detour) {
     if (detourMap == null) {
-      detourMap = new CompactLongMap<OsmPathElementHolder>();
+      detourMap = new CompactLongMap<>();
     }
     OsmPathElementHolder nh = new OsmPathElementHolder();
     nh.node = detour;
@@ -98,12 +98,12 @@ public final class OsmTrack {
   }
 
   public void copyDetours(OsmTrack source) {
-    detourMap = source.detourMap == null ? null : new FrozenLongMap<OsmPathElementHolder>(source.detourMap);
+    detourMap = source.detourMap == null ? null : new FrozenLongMap<>(source.detourMap);
   }
 
   public void addDetours(OsmTrack source) {
     if (detourMap != null) {
-      CompactLongMap<OsmPathElementHolder> tmpDetourMap = new CompactLongMap<OsmPathElementHolder>();
+      CompactLongMap<OsmPathElementHolder> tmpDetourMap = new CompactLongMap<>();
 
       List oldlist = ((FrozenLongMap) detourMap).getValueList();
       long[] oldidlist = ((FrozenLongMap) detourMap).getKeyArray();
@@ -124,7 +124,7 @@ public final class OsmTrack {
           }
         }
       }
-      detourMap = new FrozenLongMap<OsmPathElementHolder>(tmpDetourMap);
+      detourMap = new FrozenLongMap<>(tmpDetourMap);
     }
   }
 
@@ -132,7 +132,7 @@ public final class OsmTrack {
 
   public void appendDetours(OsmTrack source) {
     if (detourMap == null) {
-      detourMap = source.detourMap == null ? null : new CompactLongMap<OsmPathElementHolder>();
+      detourMap = source.detourMap == null ? null : new CompactLongMap<>();
     }
     if (source.detourMap != null) {
       int pos = nodes.size() - source.nodes.size() + 1;
@@ -160,7 +160,7 @@ public final class OsmTrack {
   }
 
   public void buildMap() {
-    nodesMap = new CompactLongMap<OsmPathElementHolder>();
+    nodesMap = new CompactLongMap<>();
     for (OsmPathElement node : nodes) {
       long id = node.getIdFromPos();
       OsmPathElementHolder nh = new OsmPathElementHolder();
@@ -175,11 +175,11 @@ public final class OsmTrack {
         nodesMap.fastPut(id, nh);
       }
     }
-    nodesMap = new FrozenLongMap<OsmPathElementHolder>(nodesMap);
+    nodesMap = new FrozenLongMap<>(nodesMap);
   }
 
   private List<String> aggregateMessages() {
-    ArrayList<String> res = new ArrayList<String>();
+    ArrayList<String> res = new ArrayList<>();
     MessageData current = null;
     for (OsmPathElement n : nodes) {
       if (n.message != null && n.message.wayKeyValues != null) {
@@ -201,7 +201,7 @@ public final class OsmTrack {
   }
 
   private List<String> aggregateSpeedProfile() {
-    ArrayList<String> res = new ArrayList<String>();
+    ArrayList<String> res = new ArrayList<>();
     int vmax = -1;
     int vmaxe = -1;
     int vmin = -1;
@@ -1289,7 +1289,7 @@ public final class OsmTrack {
     i = 0;
 
     node = nodes.get(nodeNr);
-    List<VoiceHint> inputs = new ArrayList<VoiceHint>();
+    List<VoiceHint> inputs = new ArrayList<>();
     while (node != null) {
       if (node.origin != null) {
         VoiceHint input = new VoiceHint();
diff --git a/brouter-core/src/main/java/btools/router/RoutingContext.java b/brouter-core/src/main/java/btools/router/RoutingContext.java
index 412763b..5d7c8f1 100644
--- a/brouter-core/src/main/java/btools/router/RoutingContext.java
+++ b/brouter-core/src/main/java/btools/router/RoutingContext.java
@@ -274,7 +274,7 @@ public final class RoutingContext {
   public void cleanNogoList(List<OsmNode> waypoints) {
     nogopoints_all = nogopoints;
     if (nogopoints == null) return;
-    List<OsmNodeNamed> nogos = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> nogos = new ArrayList<>();
     for (OsmNodeNamed nogo : nogopoints) {
       boolean goodGuy = true;
       for (OsmNode wp : waypoints) {
@@ -386,7 +386,7 @@ public final class RoutingContext {
 
   public void setWaypoint(OsmNodeNamed wp, OsmNodeNamed pendingEndpoint, boolean endpoint) {
     keepnogopoints = nogopoints;
-    nogopoints = new ArrayList<OsmNodeNamed>();
+    nogopoints = new ArrayList<>();
     nogopoints.add(wp);
     if (keepnogopoints != null) nogopoints.addAll(keepnogopoints);
     isEndpoint = endpoint;
diff --git a/brouter-core/src/main/java/btools/router/RoutingEngine.java b/brouter-core/src/main/java/btools/router/RoutingEngine.java
index 3ce2c46..c731b5c 100644
--- a/brouter-core/src/main/java/btools/router/RoutingEngine.java
+++ b/brouter-core/src/main/java/btools/router/RoutingEngine.java
@@ -26,7 +26,7 @@ import btools.util.StackSampler;
 
 public class RoutingEngine extends Thread {
   private NodesCache nodesCache;
-  private SortedHeap<OsmPath> openSet = new SortedHeap<OsmPath>();
+  private SortedHeap<OsmPath> openSet = new SortedHeap<>();
   private boolean finished = false;
 
   protected List<OsmNodeNamed> waypoints = null;
@@ -146,7 +146,7 @@ public class RoutingEngine extends Thread {
       OsmTrack[] refTracks = new OsmTrack[nsections]; // used ways for alternatives
       OsmTrack[] lastTracks = new OsmTrack[nsections];
       OsmTrack track = null;
-      ArrayList<String> messageList = new ArrayList<String>();
+      ArrayList<String> messageList = new ArrayList<>();
       for (int i = 0; ; i++) {
         track = findTrack(refTracks, lastTracks);
         track.message = "track-length = " + track.distance + " filtered ascend = " + track.ascend
@@ -362,7 +362,7 @@ public class RoutingEngine extends Thread {
     try {
       MatchedWaypoint seedPoint = new MatchedWaypoint();
       seedPoint.waypoint = waypoints.get(0);
-      List<MatchedWaypoint> listOne = new ArrayList<MatchedWaypoint>();
+      List<MatchedWaypoint> listOne = new ArrayList<>();
       listOne.add(seedPoint);
       matchWaypointsToNodes(listOne);
 
@@ -437,7 +437,7 @@ public class RoutingEngine extends Thread {
     }
 
     if (matchedWaypoints == null) { // could exist from the previous alternative level
-      matchedWaypoints = new ArrayList<MatchedWaypoint>();
+      matchedWaypoints = new ArrayList<>();
       for (int i = 0; i < nUnmatched; i++) {
         MatchedWaypoint mwp = new MatchedWaypoint();
         mwp.waypoint = waypoints.get(i);
@@ -993,7 +993,7 @@ public class RoutingEngine extends Thread {
 
   private OsmTrack findTrack(String operationName, MatchedWaypoint startWp, MatchedWaypoint endWp, OsmTrack costCuttingTrack, OsmTrack refTrack, boolean fastPartialRecalc) {
     try {
-      List<OsmNode> wpts2 = new ArrayList<OsmNode>();
+      List<OsmNode> wpts2 = new ArrayList<>();
       if (startWp != null) wpts2.add(startWp.waypoint);
       if (endWp != null) wpts2.add(endWp.waypoint);
       routingContext.cleanNogoList(wpts2);
@@ -1086,7 +1086,7 @@ public class RoutingEngine extends Thread {
       addToOpenset(startPath1);
       addToOpenset(startPath2);
     }
-    ArrayList<OsmPath> openBorderList = new ArrayList<OsmPath>(4096);
+    ArrayList<OsmPath> openBorderList = new ArrayList<>(4096);
     boolean memoryPanicMode = false;
     boolean needNonPanicProcessing = false;
 
diff --git a/brouter-core/src/main/java/btools/router/VoiceHint.java b/brouter-core/src/main/java/btools/router/VoiceHint.java
index 90b34c1..5fea2d7 100644
--- a/brouter-core/src/main/java/btools/router/VoiceHint.java
+++ b/brouter-core/src/main/java/btools/router/VoiceHint.java
@@ -56,7 +56,7 @@ public class VoiceHint {
       return;
     }
     if (badWays == null) {
-      badWays = new ArrayList<MessageData>();
+      badWays = new ArrayList<>();
     }
     badWays.add(badWay);
   }
diff --git a/brouter-core/src/main/java/btools/router/VoiceHintList.java b/brouter-core/src/main/java/btools/router/VoiceHintList.java
index 09eb05e..229f4ab 100644
--- a/brouter-core/src/main/java/btools/router/VoiceHintList.java
+++ b/brouter-core/src/main/java/btools/router/VoiceHintList.java
@@ -12,7 +12,7 @@ import java.util.List;
 public class VoiceHintList {
   private String transportMode;
   int turnInstructionMode;
-  List<VoiceHint> list = new ArrayList<VoiceHint>();
+  List<VoiceHint> list = new ArrayList<>();
 
   public void setTransportMode(boolean isCar, boolean isBike) {
     transportMode = isCar ? "car" : (isBike ? "bike" : "foot");
diff --git a/brouter-core/src/main/java/btools/router/VoiceHintProcessor.java b/brouter-core/src/main/java/btools/router/VoiceHintProcessor.java
index 867cfb4..6b4f37e 100644
--- a/brouter-core/src/main/java/btools/router/VoiceHintProcessor.java
+++ b/brouter-core/src/main/java/btools/router/VoiceHintProcessor.java
@@ -55,7 +55,7 @@ public final class VoiceHintProcessor {
    * @return voice hints, in forward order
    */
   public List<VoiceHint> process(List<VoiceHint> inputs) {
-    List<VoiceHint> results = new ArrayList<VoiceHint>();
+    List<VoiceHint> results = new ArrayList<>();
     double distance = 0.;
     float roundAboutTurnAngle = 0.f; // sums up angles in roundabout
 
@@ -202,7 +202,7 @@ public final class VoiceHintProcessor {
     // go through the hint list again in reverse order (=travel direction)
     // and filter out non-significant hints and hints too close to its predecessor
 
-    List<VoiceHint> results2 = new ArrayList<VoiceHint>();
+    List<VoiceHint> results2 = new ArrayList<>();
     int i = results.size();
     while (i > 0) {
       VoiceHint hint = results.get(--i);
@@ -241,7 +241,7 @@ public final class VoiceHintProcessor {
   }
 
   public List<VoiceHint> postProcess(List<VoiceHint> inputs, double catchingRange, double minRange) {
-    List<VoiceHint> results = new ArrayList<VoiceHint>();
+    List<VoiceHint> results = new ArrayList<>();
     double distance = 0;
     VoiceHint inputLast = null;
     ArrayList<VoiceHint> tmpList = new ArrayList<>();
diff --git a/brouter-expressions/src/main/java/btools/expressions/BExpressionContext.java b/brouter-expressions/src/main/java/btools/expressions/BExpressionContext.java
index 83ec562..8f05277 100644
--- a/brouter-expressions/src/main/java/btools/expressions/BExpressionContext.java
+++ b/brouter-expressions/src/main/java/btools/expressions/BExpressionContext.java
@@ -36,10 +36,10 @@ public abstract class BExpressionContext implements IByteArrayUnifier {
 
   public String _modelClass;
 
-  private Map<String, Integer> lookupNumbers = new HashMap<String, Integer>();
-  private List<BExpressionLookupValue[]> lookupValues = new ArrayList<BExpressionLookupValue[]>();
-  private List<String> lookupNames = new ArrayList<String>();
-  private List<int[]> lookupHistograms = new ArrayList<int[]>();
+  private Map<String, Integer> lookupNumbers = new HashMap<>();
+  private List<BExpressionLookupValue[]> lookupValues = new ArrayList<>();
+  private List<String> lookupNames = new ArrayList<>();
+  private List<int[]> lookupHistograms = new ArrayList<>();
   private boolean[] lookupIdxUsed;
 
   private boolean lookupDataFrozen = false;
@@ -50,7 +50,7 @@ public abstract class BExpressionContext implements IByteArrayUnifier {
   private BitCoderContext ctxEndode = new BitCoderContext(abBuf);
   private BitCoderContext ctxDecode = new BitCoderContext(new byte[0]);
 
-  private Map<String, Integer> variableNumbers = new HashMap<String, Integer>();
+  private Map<String, Integer> variableNumbers = new HashMap<>();
 
   private float[] variableData;
 
@@ -223,7 +223,7 @@ public abstract class BExpressionContext implements IByteArrayUnifier {
   }
 
   public List<String> getKeyValueList(boolean inverseDirection, byte[] ab) {
-    ArrayList<String> res = new ArrayList<String>();
+    ArrayList<String> res = new ArrayList<>();
     decode(lookupData, inverseDirection, ab);
     for (int inum = 0; inum < lookupValues.size(); inum++) { // loop over lookup names
       BExpressionLookupValue[] va = lookupValues.get(inum);
@@ -429,7 +429,7 @@ public abstract class BExpressionContext implements IByteArrayUnifier {
 
 
   public void dumpStatistics() {
-    TreeMap<String, String> counts = new TreeMap<String, String>();
+    TreeMap<String, String> counts = new TreeMap<>();
     // first count
     for (String name : lookupNumbers.keySet()) {
       int cnt = 0;
@@ -815,7 +815,7 @@ public abstract class BExpressionContext implements IByteArrayUnifier {
   private List<BExpression> _parseFile(File file) throws Exception {
     _br = new BufferedReader(new FileReader(file));
     _readerDone = false;
-    List<BExpression> result = new ArrayList<BExpression>();
+    List<BExpression> result = new ArrayList<>();
     for (; ; ) {
       BExpression exp = BExpression.parse(this, 0);
       if (exp == null) break;
diff --git a/brouter-expressions/src/main/java/btools/expressions/BExpressionLookupValue.java b/brouter-expressions/src/main/java/btools/expressions/BExpressionLookupValue.java
index e40f314..ce71f15 100644
--- a/brouter-expressions/src/main/java/btools/expressions/BExpressionLookupValue.java
+++ b/brouter-expressions/src/main/java/btools/expressions/BExpressionLookupValue.java
@@ -26,7 +26,7 @@ final class BExpressionLookupValue {
   }
 
   public void addAlias(String alias) {
-    if (aliases == null) aliases = new ArrayList<String>();
+    if (aliases == null) aliases = new ArrayList<>();
     aliases.add(alias);
   }
 
diff --git a/brouter-expressions/src/main/java/btools/expressions/BExpressionMetaData.java b/brouter-expressions/src/main/java/btools/expressions/BExpressionMetaData.java
index 1a125de..fbe9a8a 100644
--- a/brouter-expressions/src/main/java/btools/expressions/BExpressionMetaData.java
+++ b/brouter-expressions/src/main/java/btools/expressions/BExpressionMetaData.java
@@ -24,7 +24,7 @@ public final class BExpressionMetaData {
   public short lookupMinorVersion = -1;
   public short minAppVersion = -1;
 
-  private Map<String, BExpressionContext> listeners = new HashMap<String, BExpressionContext>();
+  private Map<String, BExpressionContext> listeners = new HashMap<>();
 
   public void registerListener(String context, BExpressionContext ctx) {
     listeners.put(context, ctx);
diff --git a/brouter-map-creator/src/main/java/btools/mapcreator/MapCreatorBase.java b/brouter-map-creator/src/main/java/btools/mapcreator/MapCreatorBase.java
index e7092a4..24c69a6 100644
--- a/brouter-map-creator/src/main/java/btools/mapcreator/MapCreatorBase.java
+++ b/brouter-map-creator/src/main/java/btools/mapcreator/MapCreatorBase.java
@@ -25,7 +25,7 @@ public abstract class MapCreatorBase implements WayListener, NodeListener, Relat
   protected Map<String, String> tags;
 
   public void putTag(String key, String value) {
-    if (tags == null) tags = new HashMap<String, String>();
+    if (tags == null) tags = new HashMap<>();
     tags.put(key, value);
   }
 
diff --git a/brouter-map-creator/src/main/java/btools/mapcreator/OsmNodeP.java b/brouter-map-creator/src/main/java/btools/mapcreator/OsmNodeP.java
index 31cb472..572554e 100644
--- a/brouter-map-creator/src/main/java/btools/mapcreator/OsmNodeP.java
+++ b/brouter-map-creator/src/main/java/btools/mapcreator/OsmNodeP.java
@@ -105,7 +105,7 @@ public class OsmNodeP extends OsmLinkP {
   }
 
   public void checkDuplicateTargets() {
-    HashMap<OsmNodeP, OsmLinkP> targets = new HashMap<OsmNodeP, OsmLinkP>();
+    HashMap<OsmNodeP, OsmLinkP> targets = new HashMap<>();
 
     for (OsmLinkP link0 = getFirstLink(); link0 != null; link0 = link0.getNext(this)) {
       OsmLinkP link = link0;
@@ -165,14 +165,14 @@ public class OsmNodeP extends OsmLinkP {
     mc.writeVarBytes(getNodeDecsription());
 
     // buffer internal reverse links
-    ArrayList<OsmNodeP> internalReverse = new ArrayList<OsmNodeP>();
+    ArrayList<OsmNodeP> internalReverse = new ArrayList<>();
 
     for (OsmLinkP link0 = getFirstLink(); link0 != null; link0 = link0.getNext(this)) {
       OsmLinkP link = link0;
       OsmNodeP origin = this;
       OsmNodeP target = null;
 
-      ArrayList<OsmNodeP> linkNodes = new ArrayList<OsmNodeP>();
+      ArrayList<OsmNodeP> linkNodes = new ArrayList<>();
       linkNodes.add(this);
 
       // first pass just to see if that link is consistent
diff --git a/brouter-map-creator/src/main/java/btools/mapcreator/OsmTrafficMap.java b/brouter-map-creator/src/main/java/btools/mapcreator/OsmTrafficMap.java
index 146ffd2..ca6d119 100644
--- a/brouter-map-creator/src/main/java/btools/mapcreator/OsmTrafficMap.java
+++ b/brouter-map-creator/src/main/java/btools/mapcreator/OsmTrafficMap.java
@@ -52,7 +52,7 @@ public class OsmTrafficMap {
     public OsmTrafficElement next;
   }
 
-  private CompactLongMap<OsmTrafficElement> map = new CompactLongMap<OsmTrafficElement>();
+  private CompactLongMap<OsmTrafficElement> map = new CompactLongMap<>();
 
   public void loadAll(File file, int minLon, int minLat, int maxLon, int maxLat, boolean includeMotorways) throws Exception {
     load(file, minLon, minLat, maxLon, maxLat, includeMotorways);
@@ -107,7 +107,7 @@ public class OsmTrafficMap {
       is.close();
     }
 
-    map = new FrozenLongMap<OsmTrafficElement>(map);
+    map = new FrozenLongMap<>(map);
     System.out.println("read traffic-elements: " + trafficElements);
   }
 
diff --git a/brouter-map-creator/src/main/java/btools/mapcreator/PosUnifier.java b/brouter-map-creator/src/main/java/btools/mapcreator/PosUnifier.java
index 2943052..a82398b 100644
--- a/brouter-map-creator/src/main/java/btools/mapcreator/PosUnifier.java
+++ b/brouter-map-creator/src/main/java/btools/mapcreator/PosUnifier.java
@@ -186,7 +186,7 @@ public class PosUnifier extends MapCreatorBase {
   }
 
   private void resetSrtm() {
-    srtmmap = new HashMap<String, SrtmRaster>();
+    srtmmap = new HashMap<>();
     lastSrtmLonIdx = -1;
     lastSrtmLatIdx = -1;
     lastSrtmRaster = null;
diff --git a/brouter-map-creator/src/main/java/btools/mapcreator/RelationMerger.java b/brouter-map-creator/src/main/java/btools/mapcreator/RelationMerger.java
index 4defd2f..7715bf8 100644
--- a/brouter-map-creator/src/main/java/btools/mapcreator/RelationMerger.java
+++ b/brouter-map-creator/src/main/java/btools/mapcreator/RelationMerger.java
@@ -53,7 +53,7 @@ public class RelationMerger extends MapCreatorBase {
     // expctxStat = new BExpressionContext("way");
 
     // *** read the relation file into sets for each processed tag
-    routesets = new HashMap<String, CompactLongSet>();
+    routesets = new HashMap<>();
     routesetall = new CompactLongSet();
     DataInputStream dis = createInStream(relationFileIn);
     try {
diff --git a/brouter-map-creator/src/main/java/btools/mapcreator/RelationStatistics.java b/brouter-map-creator/src/main/java/btools/mapcreator/RelationStatistics.java
index 25aef0b..a6d5e04 100644
--- a/brouter-map-creator/src/main/java/btools/mapcreator/RelationStatistics.java
+++ b/brouter-map-creator/src/main/java/btools/mapcreator/RelationStatistics.java
@@ -25,7 +25,7 @@ public class RelationStatistics extends MapCreatorBase {
   }
 
   public void process(File relationFileIn) throws Exception {
-    HashMap<String, long[]> relstats = new HashMap<String, long[]>();
+    HashMap<String, long[]> relstats = new HashMap<>();
 
     DataInputStream dis = createInStream(relationFileIn);
     try {
diff --git a/brouter-map-creator/src/main/java/btools/mapcreator/WayLinker.java b/brouter-map-creator/src/main/java/btools/mapcreator/WayLinker.java
index 37220e3..2e1c273 100644
--- a/brouter-map-creator/src/main/java/btools/mapcreator/WayLinker.java
+++ b/brouter-map-creator/src/main/java/btools/mapcreator/WayLinker.java
@@ -108,7 +108,7 @@ public class WayLinker extends MapCreatorBase implements Runnable {
   private void reset() {
     minLon = -1;
     minLat = -1;
-    nodesMap = new CompactLongMap<OsmNodeP>();
+    nodesMap = new CompactLongMap<>();
     borderSet = new CompactLongSet();
   }
 
@@ -231,7 +231,7 @@ public class WayLinker extends MapCreatorBase implements Runnable {
       new NodeIterator(this, true).processFile(nodeFile);
 
       // freeze the nodes-map
-      FrozenLongMap<OsmNodeP> nodesMapFrozen = new FrozenLongMap<OsmNodeP>(nodesMap);
+      FrozenLongMap<OsmNodeP> nodesMapFrozen = new FrozenLongMap<>(nodesMap);
       nodesMap = nodesMapFrozen;
 
       File restrictionFile = fileFromTemplate(wayfile, new File(nodeTilesIn.getParentFile(), "restrictions55"), "rt5");
@@ -415,7 +415,7 @@ public class WayLinker extends MapCreatorBase implements Runnable {
       int nLatSegs = (maxLat - minLat) / 1000000;
 
       // sort the nodes into segments
-      LazyArrayOfLists<OsmNodeP> seglists = new LazyArrayOfLists<OsmNodeP>(nLonSegs * nLatSegs);
+      LazyArrayOfLists<OsmNodeP> seglists = new LazyArrayOfLists<>(nLonSegs * nLatSegs);
       for (OsmNodeP n : nodesList) {
         if (n == null || n.getFirstLink() == null || n.isTransferNode())
           continue;
@@ -450,7 +450,7 @@ public class WayLinker extends MapCreatorBase implements Runnable {
           if (seglists.getSize(tileIndex) > 0) {
             List<OsmNodeP> nlist = seglists.getList(tileIndex);
 
-            LazyArrayOfLists<OsmNodeP> subs = new LazyArrayOfLists<OsmNodeP>(ncaches);
+            LazyArrayOfLists<OsmNodeP> subs = new LazyArrayOfLists<>(ncaches);
             byte[][] subByteArrays = new byte[ncaches][];
             for (int ni = 0; ni < nlist.size(); ni++) {
               OsmNodeP n = nlist.get(ni);
@@ -473,7 +473,7 @@ public class WayLinker extends MapCreatorBase implements Runnable {
                 MicroCache mc = new MicroCache2(size, abBuf2, lonIdxDiv, latIdxDiv, divisor);
 
                 // sort via treemap
-                TreeMap<Integer, OsmNodeP> sortedList = new TreeMap<Integer, OsmNodeP>();
+                TreeMap<Integer, OsmNodeP> sortedList = new TreeMap<>();
                 for (OsmNodeP n : subList) {
                   long longId = n.getIdFromPos();
                   int shrinkid = mc.shrinkId(longId);
diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java b/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java
index b42a9b9..2e7d0b2 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java
@@ -95,7 +95,7 @@ public final class NodesCache {
         fileRows = new OsmFile[180][];
       }
     } else {
-      fileCache = new HashMap<String, PhysicalFile>(4);
+      fileCache = new HashMap<>(4);
       fileRows = new OsmFile[180][];
       dataBuffers = new DataBuffers();
       secondarySegmentsDir = StorageConfigHelper.getSecondarySegmentDir(segmentDir);
diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/OsmNodePairSet.java b/brouter-mapaccess/src/main/java/btools/mapaccess/OsmNodePairSet.java
index 6c1e38e..3fe874e 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/OsmNodePairSet.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/OsmNodePairSet.java
@@ -50,7 +50,7 @@ public class OsmNodePairSet {
 
   private void addPair(long n1, long n2) {
     if (map == null) {
-      map = new CompactLongMap<OsmNodePair>();
+      map = new CompactLongMap<>();
     }
     npairs++;
 
diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/OsmNodesMap.java b/brouter-mapaccess/src/main/java/btools/mapaccess/OsmNodesMap.java
index 28a2238..83863d8 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/OsmNodesMap.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/OsmNodesMap.java
@@ -13,7 +13,7 @@ import java.util.Map;
 import btools.util.ByteArrayUnifier;
 
 public final class OsmNodesMap {
-  private Map<OsmNode, OsmNode> hmap = new HashMap<OsmNode, OsmNode>(4096);
+  private Map<OsmNode, OsmNode> hmap = new HashMap<>(4096);
 
   private ByteArrayUnifier abUnifier = new ByteArrayUnifier(16384, false);
 
@@ -176,7 +176,7 @@ public final class OsmNodesMap {
   }
 
   public void collectOutreachers() {
-    nodes2check = new ArrayList<OsmNode>(nodesCreated);
+    nodes2check = new ArrayList<>(nodesCreated);
     nodesCreated = 0;
     for (OsmNode n : hmap.values()) {
       addActiveNode(nodes2check, n);
diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/WaypointMatcherImpl.java b/brouter-mapaccess/src/main/java/btools/mapaccess/WaypointMatcherImpl.java
index 85ab9b5..e70d3be 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/WaypointMatcherImpl.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/WaypointMatcherImpl.java
@@ -51,7 +51,7 @@ public final class WaypointMatcherImpl implements WaypointMatcher {
     }
 
     // sort result list
-    comparator = new Comparator<MatchedWaypoint>() {
+    comparator = new Comparator<>() {
       @Override
       public int compare(MatchedWaypoint mw1, MatchedWaypoint mw2) {
         int cmpDist = Double.compare(mw1.radius, mw2.radius);
diff --git a/brouter-routing-app/src/main/java/btools/routingapp/BInstallerActivity.java b/brouter-routing-app/src/main/java/btools/routingapp/BInstallerActivity.java
index 31e597e..6e7bf5d 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/BInstallerActivity.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/BInstallerActivity.java
@@ -488,11 +488,11 @@ public class BInstallerActivity extends AppCompatActivity {
   }
 
   private void downloadDiffVersionTiles() {
-    downloadAll(new ArrayList<Integer>(), DownloadWorker.VALUE_SEGMENT_DIFFS);
+    downloadAll(new ArrayList<>(), DownloadWorker.VALUE_SEGMENT_DIFFS);
   }
 
   private void dropDiffVersionTiles() {
-    downloadAll(new ArrayList<Integer>(), DownloadWorker.VALUE_SEGMENT_DROPDIFFS);
+    downloadAll(new ArrayList<>(), DownloadWorker.VALUE_SEGMENT_DROPDIFFS);
   }
 
   private boolean isDownloadRunning(Class<?> serviceClass) {
diff --git a/brouter-routing-app/src/main/java/btools/routingapp/BRouterService.java b/brouter-routing-app/src/main/java/btools/routingapp/BRouterService.java
index eb6a129..b2429a0 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/BRouterService.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/BRouterService.java
@@ -199,8 +199,8 @@ public class BRouterService extends Service {
     private void readNogos(BRouterWorker worker, String baseDir) throws Exception {
       // add nogos from waypoint database
       CoordinateReader cor = CoordinateReader.obtainValidReader(baseDir, true);
-      worker.nogoList = new ArrayList<OsmNodeNamed>(cor.nogopoints);
-      worker.nogoPolygonsList = new ArrayList<OsmNodeNamed>();
+      worker.nogoList = new ArrayList<>(cor.nogopoints);
+      worker.nogoPolygonsList = new ArrayList<>();
     }
 
     private boolean fileEqual(byte[] fileBytes, File file) throws Exception {
diff --git a/brouter-routing-app/src/main/java/btools/routingapp/BRouterWorker.java b/brouter-routing-app/src/main/java/btools/routingapp/BRouterWorker.java
index 4d74130..ec3fce0 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/BRouterWorker.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/BRouterWorker.java
@@ -126,7 +126,7 @@ public class BRouterWorker {
     }
 
     if (params.containsKey("extraParams")) {  // add user params
-      if (rc.keyValues == null) rc.keyValues = new HashMap<String, String>();
+      if (rc.keyValues == null) rc.keyValues = new HashMap<>();
       StringTokenizer tk = new StringTokenizer(extraParams, "?&");
       while (tk.hasMoreTokens()) {
         String t = tk.nextToken();
@@ -212,7 +212,7 @@ public class BRouterWorker {
   }
 
   private List<OsmNodeNamed> readPositions(Bundle params) {
-    List<OsmNodeNamed> wplist = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> wplist = new ArrayList<>();
 
     double[] lats = params.getDoubleArray("lats");
     double[] lons = params.getDoubleArray("lons");
@@ -235,7 +235,7 @@ public class BRouterWorker {
   }
 
   private List<OsmNodeNamed> readLonlats(Bundle params) {
-    List<OsmNodeNamed> wplist = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> wplist = new ArrayList<>();
 
     String lonLats = params.getString("lonlats");
     if (lonLats == null) throw new IllegalArgumentException("lonlats parameter not set");
@@ -315,7 +315,7 @@ public class BRouterWorker {
 
     String[] lonLatRadList = nogos.split("\\|");
 
-    List<OsmNodeNamed> nogoList = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> nogoList = new ArrayList<>();
     for (int i = 0; i < lonLatRadList.length; i++) {
       String[] lonLatRad = lonLatRadList[i].split(",");
       String nogoWeight = "NaN";
@@ -344,7 +344,7 @@ public class BRouterWorker {
   }
 
   private List<OsmNodeNamed> readNogoPolygons(Bundle params) {
-    List<OsmNodeNamed> result = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> result = new ArrayList<>();
     parseNogoPolygons(params.getString("polylines"), result, false);
     parseNogoPolygons(params.getString("polygons"), result, true);
     return result.size() > 0 ? result : null;
@@ -389,7 +389,7 @@ public class BRouterWorker {
 
     String[] lonLatNameList = pois.split("\\|");
 
-    List<OsmNodeNamed> poisList = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> poisList = new ArrayList<>();
     for (int i = 0; i < lonLatNameList.length; i++) {
       String[] lonLatName = lonLatNameList[i].split(",");
 
diff --git a/brouter-routing-app/src/main/java/btools/routingapp/ConfigMigration.java b/brouter-routing-app/src/main/java/btools/routingapp/ConfigMigration.java
index 40e9db8..a4e9c02 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/ConfigMigration.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/ConfigMigration.java
@@ -33,7 +33,7 @@ public class ConfigMigration {
       }
       br.close();
 
-      List<String> lines = new ArrayList<String>();
+      List<String> lines = new ArrayList<>();
       br = new BufferedReader(new FileReader(dstFile));
       for (; ; ) {
         String line = br.readLine();
@@ -76,7 +76,7 @@ public class ConfigMigration {
     BufferedReader br = null;
     BufferedWriter bw = null;
     File configFile = new File(segmentDir, "storageconfig.txt");
-    List<String> lines = new ArrayList<String>();
+    List<String> lines = new ArrayList<>();
     try {
       br = new BufferedReader(new FileReader(configFile));
       for (; ; ) {
diff --git a/brouter-routing-app/src/main/java/btools/routingapp/ServiceModeConfig.java b/brouter-routing-app/src/main/java/btools/routingapp/ServiceModeConfig.java
index 63f30ba..20f8ea6 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/ServiceModeConfig.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/ServiceModeConfig.java
@@ -19,7 +19,7 @@ public class ServiceModeConfig {
     profile = tk.nextToken();
     if (tk.hasMoreTokens()) params = tk.nextToken();
     else params = "noparams";
-    nogoVetos = new TreeSet<String>();
+    nogoVetos = new TreeSet<>();
     while (tk.hasMoreTokens()) {
       nogoVetos.add(tk.nextToken());
     }
@@ -29,7 +29,7 @@ public class ServiceModeConfig {
     this.mode = mode;
     this.profile = profile;
     this.params = params;
-    nogoVetos = new TreeSet<String>();
+    nogoVetos = new TreeSet<>();
   }
 
   public String toLine() {
diff --git a/brouter-server/src/main/java/btools/server/Area.java b/brouter-server/src/main/java/btools/server/Area.java
index 2c4fbd6..7ca5c92 100644
--- a/brouter-server/src/main/java/btools/server/Area.java
+++ b/brouter-server/src/main/java/btools/server/Area.java
@@ -8,8 +8,8 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class Area {
-  private List<Polygon> poslist = new ArrayList<Polygon>();
-  private List<Polygon> neglist = new ArrayList<Polygon>();
+  private List<Polygon> poslist = new ArrayList<>();
+  private List<Polygon> neglist = new ArrayList<>();
 
   public static void main(String[] args) throws IOException {
     Area a = new Area(new File(args[0]));
diff --git a/brouter-server/src/main/java/btools/server/BRouter.java b/brouter-server/src/main/java/btools/server/BRouter.java
index 7832f77..90ded9c 100644
--- a/brouter-server/src/main/java/btools/server/BRouter.java
+++ b/brouter-server/src/main/java/btools/server/BRouter.java
@@ -63,7 +63,7 @@ public class BRouter {
           maxRunningTime = Integer.parseInt(sMaxRunningTime) * 1000;
         }
 
-        List<OsmNodeNamed> wplist = new ArrayList<OsmNodeNamed>();
+        List<OsmNodeNamed> wplist = new ArrayList<>();
         wplist.add(from);
         wplist.add(to);
 
@@ -83,7 +83,7 @@ public class BRouter {
       System.out.println("usage: java -jar brouter.jar <segmentdir> <lon-from> <lat-from> <lon-to> <lat-to> <profile>");
       return;
     }
-    List<OsmNodeNamed> wplist = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> wplist = new ArrayList<>();
     wplist.add(readPosition(args, 1, "from"));
     RoutingEngine re = null;
     if ("seed".equals(args[3])) {
diff --git a/brouter-server/src/main/java/btools/server/IpAccessMonitor.java b/brouter-server/src/main/java/btools/server/IpAccessMonitor.java
index d9169bb..b69c737 100644
--- a/brouter-server/src/main/java/btools/server/IpAccessMonitor.java
+++ b/brouter-server/src/main/java/btools/server/IpAccessMonitor.java
@@ -5,7 +5,7 @@ import java.util.Map;
 
 public class IpAccessMonitor {
   private static Object sync = new Object();
-  private static Map<String, Long> ipAccess = new HashMap<String, Long>();
+  private static Map<String, Long> ipAccess = new HashMap<>();
   private static long MAX_IDLE = 900000; // 15 minutes
   private static long CLEANUP_INTERVAL = 10000; // 10 seconds
   private static long lastCleanup;
@@ -31,7 +31,7 @@ public class IpAccessMonitor {
   }
 
   private static void cleanup(long t) {
-    HashMap<String, Long> newMap = new HashMap<String, Long>(ipAccess.size());
+    HashMap<String, Long> newMap = new HashMap<>(ipAccess.size());
     for (Map.Entry<String, Long> e : ipAccess.entrySet()) {
       if (t - e.getValue().longValue() <= MAX_IDLE) {
         newMap.put(e.getKey(), e.getValue());
diff --git a/brouter-server/src/main/java/btools/server/Polygon.java b/brouter-server/src/main/java/btools/server/Polygon.java
index 149a1c2..9115ef1 100644
--- a/brouter-server/src/main/java/btools/server/Polygon.java
+++ b/brouter-server/src/main/java/btools/server/Polygon.java
@@ -15,7 +15,7 @@ public class Polygon {
   private int maxy = Integer.MIN_VALUE;
 
   public Polygon(BufferedReader br) throws IOException {
-    ArrayList<String> lines = new ArrayList<String>();
+    ArrayList<String> lines = new ArrayList<>();
 
     for (; ; ) {
       String line = br.readLine();
diff --git a/brouter-server/src/main/java/btools/server/RouteServer.java b/brouter-server/src/main/java/btools/server/RouteServer.java
index 60009f8..8bd4021 100644
--- a/brouter-server/src/main/java/btools/server/RouteServer.java
+++ b/brouter-server/src/main/java/btools/server/RouteServer.java
@@ -199,7 +199,7 @@ public class RouteServer extends Thread implements Comparable<RouteServer> {
           rc.forceUseStartDirection = true;
         } else if (e.getKey().startsWith("profile:")) {
           if (rc.keyValues == null) {
-            rc.keyValues = new HashMap<String, String>();
+            rc.keyValues = new HashMap<>();
           }
           rc.keyValues.put(e.getKey().substring(8), e.getValue());
         } else if (e.getKey().equals("straight")) {
@@ -294,7 +294,7 @@ public class RouteServer extends Thread implements Comparable<RouteServer> {
 
     ProfileCache.setSize(2 * maxthreads);
 
-    PriorityQueue<RouteServer> threadQueue = new PriorityQueue<RouteServer>();
+    PriorityQueue<RouteServer> threadQueue = new PriorityQueue<>();
 
     ServerSocket serverSocket = args.length > 5 ? new ServerSocket(Integer.parseInt(args[3]), 100, InetAddress.getByName(args[5])) : new ServerSocket(Integer.parseInt(args[3]));
 
@@ -359,7 +359,7 @@ public class RouteServer extends Thread implements Comparable<RouteServer> {
 
 
   private static Map<String, String> getUrlParams(String url) throws UnsupportedEncodingException {
-    HashMap<String, String> params = new HashMap<String, String>();
+    HashMap<String, String> params = new HashMap<>();
     String decoded = URLDecoder.decode(url, "UTF-8");
     StringTokenizer tk = new StringTokenizer(decoded, "?&");
     while (tk.hasMoreTokens()) {
diff --git a/brouter-server/src/main/java/btools/server/SuspectManager.java b/brouter-server/src/main/java/btools/server/SuspectManager.java
index 6cecf64..303c699 100644
--- a/brouter-server/src/main/java/btools/server/SuspectManager.java
+++ b/brouter-server/src/main/java/btools/server/SuspectManager.java
@@ -244,7 +244,7 @@ public class SuspectManager extends Thread {
       bw.write("<table>\n");
       File countryParent = new File("worldpolys" + country);
       File[] files = countryParent.listFiles();
-      TreeSet<String> names = new TreeSet<String>();
+      TreeSet<String> names = new TreeSet<>();
       for (File f : files) {
         String name = f.getName();
         if (name.endsWith(".poly")) {
@@ -580,7 +580,7 @@ public class SuspectManager extends Thread {
     }
   }
 
-  private static Map<String, SuspectList> allSuspectsMap = new HashMap<String, SuspectList>();
+  private static Map<String, SuspectList> allSuspectsMap = new HashMap<>();
 
   private static SuspectList getDailySuspectsIfLoaded() throws IOException {
     synchronized (allSuspectsMap) {
diff --git a/brouter-server/src/main/java/btools/server/request/ProfileUploadHandler.java b/brouter-server/src/main/java/btools/server/request/ProfileUploadHandler.java
index 4cc2138..78a39cf 100644
--- a/brouter-server/src/main/java/btools/server/request/ProfileUploadHandler.java
+++ b/brouter-server/src/main/java/btools/server/request/ProfileUploadHandler.java
@@ -51,7 +51,7 @@ public class ProfileUploadHandler {
       fileWriter.flush();
       //System.out.println("data: |" + sw.toString() + "|");
 
-      Map<String, String> responseData = new HashMap<String, String>();
+      Map<String, String> responseData = new HashMap<>();
       responseData.put("profileid", CUSTOM_PREFIX + id);
 
       validateProfile(id, responseData);
diff --git a/brouter-server/src/main/java/btools/server/request/ServerHandler.java b/brouter-server/src/main/java/btools/server/request/ServerHandler.java
index 273c3c9..fb8f520 100644
--- a/brouter-server/src/main/java/btools/server/request/ServerHandler.java
+++ b/brouter-server/src/main/java/btools/server/request/ServerHandler.java
@@ -94,7 +94,7 @@ public class ServerHandler extends RequestHandler {
     if (coords.length < 2)
       throw new IllegalArgumentException("we need two lat/lon points at least!");
 
-    List<OsmNodeNamed> wplist = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> wplist = new ArrayList<>();
     for (int i = 0; i < coords.length; i++) {
       String[] lonLat = coords[i].split(",");
       if (lonLat.length < 2)
@@ -213,7 +213,7 @@ public class ServerHandler extends RequestHandler {
 
     String[] lonLatNameList = pois.split("\\|");
 
-    List<OsmNodeNamed> poisList = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> poisList = new ArrayList<>();
     for (int i = 0; i < lonLatNameList.length; i++) {
       String[] lonLatName = lonLatNameList[i].split(",");
 
@@ -237,7 +237,7 @@ public class ServerHandler extends RequestHandler {
 
     String[] lonLatRadList = nogos.split("\\|");
 
-    List<OsmNodeNamed> nogoList = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> nogoList = new ArrayList<>();
     for (int i = 0; i < lonLatRadList.length; i++) {
       String[] lonLatRad = lonLatRadList[i].split(",");
       String nogoWeight = "NaN";
@@ -266,7 +266,7 @@ public class ServerHandler extends RequestHandler {
   }
 
   private List<OsmNodeNamed> readNogoPolygons() {
-    List<OsmNodeNamed> result = new ArrayList<OsmNodeNamed>();
+    List<OsmNodeNamed> result = new ArrayList<>();
     parseNogoPolygons(params.get("polylines"), result, false);
     parseNogoPolygons(params.get("polygons"), result, true);
     return result.size() > 0 ? result : null;
diff --git a/brouter-util/src/main/java/btools/util/DenseLongMap.java b/brouter-util/src/main/java/btools/util/DenseLongMap.java
index d0142df..96e6e32 100644
--- a/brouter-util/src/main/java/btools/util/DenseLongMap.java
+++ b/brouter-util/src/main/java/btools/util/DenseLongMap.java
@@ -17,7 +17,7 @@ import java.util.List;
  * @author ab
  */
 public class DenseLongMap {
-  private List<byte[]> blocklist = new ArrayList<byte[]>(4096);
+  private List<byte[]> blocklist = new ArrayList<>(4096);
 
   private int blocksize; // bytes per bitplane in one block
   private int blocksizeBits;
diff --git a/brouter-util/src/main/java/btools/util/FrozenLongMap.java b/brouter-util/src/main/java/btools/util/FrozenLongMap.java
index b93f391..35945f3 100644
--- a/brouter-util/src/main/java/btools/util/FrozenLongMap.java
+++ b/brouter-util/src/main/java/btools/util/FrozenLongMap.java
@@ -20,7 +20,7 @@ public class FrozenLongMap<V> extends CompactLongMap<V> {
     size = map.size();
 
     faid = new long[size];
-    flv = new ArrayList<V>(size);
+    flv = new ArrayList<>(size);
 
     map.moveToFrozenArrays(faid, flv);
 
diff --git a/brouter-util/src/main/java/btools/util/LazyArrayOfLists.java b/brouter-util/src/main/java/btools/util/LazyArrayOfLists.java
index 4285738..d8b05a5 100644
--- a/brouter-util/src/main/java/btools/util/LazyArrayOfLists.java
+++ b/brouter-util/src/main/java/btools/util/LazyArrayOfLists.java
@@ -13,7 +13,7 @@ public class LazyArrayOfLists<E> {
   private List<ArrayList<E>> lists;
 
   public LazyArrayOfLists(int size) {
-    lists = new ArrayList<ArrayList<E>>(size);
+    lists = new ArrayList<>(size);
     for (int i = 0; i < size; i++) {
       lists.add(null);
     }
@@ -22,7 +22,7 @@ public class LazyArrayOfLists<E> {
   public List<E> getList(int idx) {
     ArrayList<E> list = lists.get(idx);
     if (list == null) {
-      list = new ArrayList<E>();
+      list = new ArrayList<>();
       lists.set(idx, list);
     }
     return list;
diff --git a/brouter-util/src/test/java/btools/util/CompactMapTest.java b/brouter-util/src/test/java/btools/util/CompactMapTest.java
index 1dee666..b0a4459 100644
--- a/brouter-util/src/test/java/btools/util/CompactMapTest.java
+++ b/brouter-util/src/test/java/btools/util/CompactMapTest.java
@@ -22,9 +22,9 @@ public class CompactMapTest {
 
   private void hashMapComparison(int mapsize, int trycount) {
     Random rand = new Random(12345);
-    HashMap<Long, String> hmap = new HashMap<Long, String>();
-    CompactLongMap<String> cmap_slow = new CompactLongMap<String>();
-    CompactLongMap<String> cmap_fast = new CompactLongMap<String>();
+    HashMap<Long, String> hmap = new HashMap<>();
+    CompactLongMap<String> cmap_slow = new CompactLongMap<>();
+    CompactLongMap<String> cmap_fast = new CompactLongMap<>();
 
     for (int i = 0; i < mapsize; i++) {
       String s = "" + i;
@@ -40,8 +40,8 @@ public class CompactMapTest {
 
     for (int i = 0; i < trycount * 2; i++) {
       if (i == trycount) {
-        cmap_slow = new FrozenLongMap<String>(cmap_slow);
-        cmap_fast = new FrozenLongMap<String>(cmap_fast);
+        cmap_slow = new FrozenLongMap<>(cmap_slow);
+        cmap_fast = new FrozenLongMap<>(cmap_fast);
       }
       long k = mapsize < 10 ? i : rand.nextInt(20000);
       Long KK = new Long(k);
diff --git a/brouter-util/src/test/java/btools/util/CompactSetTest.java b/brouter-util/src/test/java/btools/util/CompactSetTest.java
index fb32366..f36ba9d 100644
--- a/brouter-util/src/test/java/btools/util/CompactSetTest.java
+++ b/brouter-util/src/test/java/btools/util/CompactSetTest.java
@@ -22,7 +22,7 @@ public class CompactSetTest {
 
   private void hashSetComparison(int setsize, int trycount) {
     Random rand = new Random(12345);
-    HashSet<Long> hset = new HashSet<Long>();
+    HashSet<Long> hset = new HashSet<>();
     CompactLongSet cset_slow = new CompactLongSet();
     CompactLongSet cset_fast = new CompactLongSet();
 
diff --git a/brouter-util/src/test/java/btools/util/DenseLongMapTest.java b/brouter-util/src/test/java/btools/util/DenseLongMapTest.java
index d9d1803..0befe05 100644
--- a/brouter-util/src/test/java/btools/util/DenseLongMapTest.java
+++ b/brouter-util/src/test/java/btools/util/DenseLongMapTest.java
@@ -16,7 +16,7 @@ public class DenseLongMapTest {
 
   private void hashMapComparison(int mapsize, int trycount, long keyrange) {
     Random rand = new Random(12345);
-    HashMap<Long, Integer> hmap = new HashMap<Long, Integer>();
+    HashMap<Long, Integer> hmap = new HashMap<>();
     DenseLongMap dmap = new DenseLongMap(512);
 
     for (int i = 0; i < mapsize; i++) {
@@ -48,7 +48,7 @@ public class DenseLongMapTest {
     int trycount = 100000;
 
     Random rand = new Random(12345);
-    HashSet<Long> hset = new HashSet<Long>();
+    HashSet<Long> hset = new HashSet<>();
 
     DenseLongMap dmap = new DenseLongMap(512);
     for (int i = 0; i < mapputs; i++) {
diff --git a/brouter-util/src/test/java/btools/util/SortedHeapTest.java b/brouter-util/src/test/java/btools/util/SortedHeapTest.java
index 8022055..75bac5a 100644
--- a/brouter-util/src/test/java/btools/util/SortedHeapTest.java
+++ b/brouter-util/src/test/java/btools/util/SortedHeapTest.java
@@ -8,7 +8,7 @@ import java.util.Random;
 public class SortedHeapTest {
   @Test
   public void sortedHeapTest1() {
-    SortedHeap<String> sh = new SortedHeap<String>();
+    SortedHeap<String> sh = new SortedHeap<>();
     Random rnd = new Random();
     for (int i = 0; i < 100000; i++) {
       int val = rnd.nextInt(1000000);
@@ -34,7 +34,7 @@ public class SortedHeapTest {
 
   @Test
   public void sortedHeapTest2() {
-    SortedHeap<String> sh = new SortedHeap<String>();
+    SortedHeap<String> sh = new SortedHeap<>();
     Random rnd = new Random();
     for (int i = 0; i < 100000; i++) {
       sh.add(i, "" + i);
diff --git a/config/pmd/pmd-ruleset.xml b/config/pmd/pmd-ruleset.xml
index 164198a..bc415a8 100644
--- a/config/pmd/pmd-ruleset.xml
+++ b/config/pmd/pmd-ruleset.xml
@@ -50,7 +50,7 @@
 
     <!-- Rules similar to Android Studio code inspection default settings -->
     <!-- <rule ref="category/java/bestpractices.xml/UnusedAssignment" /> -->
-    <!-- <rule ref="category/java/codestyle.xml/UseDiamondOperator" /> -->
+    <rule ref="category/java/codestyle.xml/UseDiamondOperator" />
     <!-- <rule ref="category/java/design.xml/ImmutableField" /> -->
     <!-- Will be added in PMD 7 -->
     <!-- <rule ref="category/java/codestyle.xml/UnnecessaryBoxing" /> -->