--- a/src/share/tools/IdealGraphVisualizer/Layout/src/com/sun/hotspot/igv/layout/LayoutGraph.java	Fri Jan 27 23:57:47 2012 +0100
+++ b/src/share/tools/IdealGraphVisualizer/Layout/src/com/sun/hotspot/igv/layout/LayoutGraph.java	Sat Jan 28 00:16:17 2012 +0100
@@ -49,10 +49,10 @@
         this.links = links;
         assert verify();
 
-        vertices = new TreeSet<Vertex>();
-        portLinks = new HashMap<Port, Set<Link>>(links.size());
-        inputPorts = new HashMap<Vertex, Set<Port>>(links.size());
-        outputPorts = new HashMap<Vertex, Set<Port>>(links.size());
+        vertices = new TreeSet<>();
+        portLinks = new HashMap<>(links.size());
+        inputPorts = new HashMap<>(links.size());
+        outputPorts = new HashMap<>(links.size());
 
         for (Link l : links) {
             Port p = l.getFrom();
@@ -76,7 +76,7 @@
             }
 
             if (!portLinks.containsKey(p)) {
-                HashSet<Link> hashSet = new HashSet<Link>(3);
+                HashSet<Link> hashSet = new HashSet<>(3);
                 portLinks.put(p, hashSet);
             }
 
@@ -152,7 +152,7 @@
     //   whole graph is visited.
     public Set<Vertex> findRootVertices(Set<Vertex> startingRoots) {
 
-        Set<Vertex> notRootSet = new HashSet<Vertex>();
+        Set<Vertex> notRootSet = new HashSet<>();
         for (Vertex v : startingRoots) {
             if (!notRootSet.contains(v)) {
                 markNotRoot(notRootSet, v, v);
@@ -174,7 +174,7 @@
             }
         }
 
-        Set<Vertex> result = new HashSet<Vertex>();
+        Set<Vertex> result = new HashSet<>();
         for (Vertex v : tmpVertices) {
             if (!notRootSet.contains(v)) {
                 result.add(v);
@@ -190,7 +190,7 @@
 
     public SortedSet<Cluster> getClusters() {
 
-        SortedSet<Cluster> clusters = new TreeSet<Cluster>();
+        SortedSet<Cluster> clusters = new TreeSet<>();
         for (Vertex v : getVertices()) {
             if (v.getCluster() != null) {
                 clusters.add(v.getCluster());