@@ -, +, @@ 
---
 .../http/org/apache/jmeter/protocol/http/parser/CssParser.java   | 9 ++-------
 .../org/apache/jmeter/protocol/http/parser/URLCollection.java    | 3 ++-
 2 files changed, 4 insertions(+), 8 deletions(-)
--- a/src/protocol/http/org/apache/jmeter/protocol/http/parser/CssParser.java	
+++ a/src/protocol/http/org/apache/jmeter/protocol/http/parser/CssParser.java	
@@ -23,6 +23,7 @@ import java.nio.charset.Charset;
 import java.util.Collections;
 import java.util.Iterator;
 
+import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.Validate;
 import org.apache.commons.lang3.tuple.ImmutableTriple;
 import org.apache.commons.lang3.tuple.Triple;
@@ -70,13 +71,7 @@ public class CssParser implements LinkExtractorParser {
             final URLCollection urlCollection = orDefault(CSS_URL_CACHE.get(triple), EMPTY_URL_COLLECTION);
 
             if (LOG.isDebugEnabled()) {
-                StringBuilder builder = new StringBuilder();
-                for (Iterator<URL> iterator = urlCollection.iterator(); iterator
-                        .hasNext();) {
-                    URL urlString = iterator.next();
-                    builder.append(urlString).append(',');
-                }
-                LOG.debug("Parsed:" + baseUrl + ", got:" + builder.toString());
+                LOG.debug("Parsed:" + baseUrl + ", got:" + StringUtils.join(urlCollection, ","));
             }
 
             return urlCollection.iterator();
--- a/src/protocol/http/org/apache/jmeter/protocol/http/parser/URLCollection.java	
+++ a/src/protocol/http/org/apache/jmeter/protocol/http/parser/URLCollection.java	
@@ -39,7 +39,7 @@ import org.apache.log.Logger;
  * does not support remove()
  *
  */
-public class URLCollection {
+public class URLCollection implements Iterable<URL> {
     private static final Logger log = LoggingManager.getLoggerForClass();
     private final Collection<URLString> coll;
 
@@ -99,6 +99,7 @@ public class URLCollection {
         return b;
     }
 
+    @Override
     public Iterator<URL> iterator() {
         return new UrlIterator(coll.iterator());
     }
--