Index: src/main/java/org/apache/maven/shared/dependency/analyzer/DefaultProjectDependencyAnalyzer.java
===================================================================
--- src/main/java/org/apache/maven/shared/dependency/analyzer/DefaultProjectDependencyAnalyzer.java	(revision 666300)
+++ src/main/java/org/apache/maven/shared/dependency/analyzer/DefaultProjectDependencyAnalyzer.java	(working copy)
@@ -71,12 +71,14 @@
         {
             Map artifactClassMap = buildArtifactClassMap( project );
 
+            Set coreClasses = buildCoreClasses();
+
             Set dependencyClasses = buildDependencyClasses( project );
 
             Set declaredArtifacts = buildDeclaredArtifacts( project );
-            
-            Set usedArtifacts = buildUsedArtifacts( artifactClassMap, dependencyClasses );
-            
+
+            Set usedArtifacts = buildUsedArtifacts( artifactClassMap, dependencyClasses, coreClasses );
+
             Set usedDeclaredArtifacts = new LinkedHashSet( declaredArtifacts );
             usedDeclaredArtifacts.retainAll( usedArtifacts );
 
@@ -159,6 +161,30 @@
         return artifactClassMap;
     }
 
+    private Set buildCoreClasses()
+        throws IOException
+    {
+        File lib = new File( System.getProperty( "java.home" ), "lib" );
+        if ( !lib.exists() || !lib.isDirectory() || !lib.canRead() )
+        {
+            return Collections.EMPTY_SET;
+        }
+        Set result = new HashSet();
+
+        File[] jars = lib.listFiles();
+        for ( int i = 0; i < jars.length; i++ )
+        {
+            File jar = jars[i];
+            if ( !jar.isFile() || !jar.canRead() || !jar.getName().endsWith( ".jar" ) )
+            {
+                continue;
+            }
+
+            result.addAll( classAnalyzer.analyze( jar.toURL() ) );
+        }
+        return result;
+    }
+
     private Set buildDependencyClasses( MavenProject project )
         throws IOException
     {
@@ -192,8 +218,8 @@
         
         return declaredArtifacts;
     }
-    
-    private Set buildUsedArtifacts( Map artifactClassMap, Set dependencyClasses )
+
+    private Set buildUsedArtifacts( Map artifactClassMap, Set dependencyClasses, Set coreClasses )
     {
         Set usedArtifacts = new HashSet();
 
@@ -201,6 +227,11 @@
         {
             String className = (String) dependencyIterator.next();
 
+            if ( coreClasses.contains( className ) )
+            {
+                continue;
+            }
+
             Artifact artifact = findArtifactForClassName( artifactClassMap, className );
 
             if ( artifact != null )