diff --git a/src/main/java/com/sun/syndication/feed/module/DCModuleImpl.java b/src/main/java/com/sun/syndication/feed/module/DCModuleImpl.java
index e4de7de..e1b7b16 100644
--- a/src/main/java/com/sun/syndication/feed/module/DCModuleImpl.java
+++ b/src/main/java/com/sun/syndication/feed/module/DCModuleImpl.java
@@ -134,7 +134,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getTitle() {
-        if (title != null && title.size() > 0) {
+        if (title != null && !title.isEmpty()) {
             return title.get(0);
         } else {
             return null;
@@ -192,7 +192,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getCreator() {
-        if (creator != null && creator.size() > 0) {
+        if (creator != null && !creator.isEmpty()) {
             return creator.get(0);
         } else {
             return null;
@@ -251,7 +251,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public DCSubject getSubject() {
-        if (subject != null && subject.size() > 0) {
+        if (subject != null && !subject.isEmpty()) {
             return subject.get(0);
         } else {
             return null;
@@ -310,7 +310,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getDescription() {
-        if (description != null && description.size() > 0) {
+        if (description != null && !description.isEmpty()) {
             return description.get(0);
         } else {
             return null;
@@ -369,7 +369,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getPublisher() {
-        if (publisher != null && publisher.size() > 0) {
+        if (publisher != null && !publisher.isEmpty()) {
             return publisher.get(0);
         } else {
             return null;
@@ -428,7 +428,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getContributor() {
-        if (contributors != null && contributors.size() > 0) {
+        if (contributors != null && !contributors.isEmpty()) {
             return contributors.get(0);
         } else {
             return null;
@@ -486,7 +486,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public Date getDate() {
-        if (date != null && date.size() > 0) {
+        if (date != null && !date.isEmpty()) {
             return date.get(0);
         } else {
             return null;
@@ -544,7 +544,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getType() {
-        if (type != null && type.size() > 0) {
+        if (type != null && !type.isEmpty()) {
             return type.get(0);
         } else {
             return null;
@@ -602,7 +602,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getFormat() {
-        if (format != null && format.size() > 0) {
+        if (format != null && !format.isEmpty()) {
             return format.get(0);
         } else {
             return null;
@@ -661,7 +661,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getIdentifier() {
-        if (identifier != null && identifier.size() > 0) {
+        if (identifier != null && !identifier.isEmpty()) {
             return identifier.get(0);
         } else {
             return null;
@@ -719,7 +719,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getSource() {
-        if (source != null && source.size() > 0) {
+        if (source != null && !source.isEmpty()) {
             return source.get(0);
         } else {
             return null;
@@ -777,7 +777,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getLanguage() {
-        if (language != null && language.size() > 0) {
+        if (language != null && !language.isEmpty()) {
             return language.get(0);
         } else {
             return null;
@@ -835,7 +835,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getRelation() {
-        if (relation != null && relation.size() > 0) {
+        if (relation != null && !relation.isEmpty()) {
             return relation.get(0);
         } else {
             return null;
@@ -893,7 +893,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getCoverage() {
-        if (coverage != null && coverage.size() > 0) {
+        if (coverage != null && !coverage.isEmpty()) {
             return coverage.get(0);
         } else {
             return null;
@@ -951,7 +951,7 @@ public class DCModuleImpl extends ModuleImpl implements DCModule {
      */
     @Override
     public String getRights() {
-        if (rights != null && rights.size() > 0) {
+        if (rights != null && !rights.isEmpty()) {
             return rights.get(0);
         } else {
             return null;
diff --git a/src/main/java/com/sun/syndication/feed/synd/SyndEntryImpl.java b/src/main/java/com/sun/syndication/feed/synd/SyndEntryImpl.java
index 3789fe6..57b7411 100644
--- a/src/main/java/com/sun/syndication/feed/synd/SyndEntryImpl.java
+++ b/src/main/java/com/sun/syndication/feed/synd/SyndEntryImpl.java
@@ -594,7 +594,7 @@ public class SyndEntryImpl implements Serializable, SyndEntry {
 
         // Start out looking for one or more authors in authors. For non-Atom
         // feeds, authors may actually be null.
-        if (authors != null && authors.size() > 0) {
+        if (authors != null && !authors.isEmpty()) {
             author = authors.get(0).getName();
         } else {
             author = getDCModule().getCreator();
diff --git a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForAtom03.java b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForAtom03.java
index dab8725..4740aed 100644
--- a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForAtom03.java
+++ b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForAtom03.java
@@ -67,19 +67,19 @@ public class ConverterForAtom03 implements Converter {
 
         syndFeed.setModules(ModuleUtils.cloneModules(aFeed.getModules()));
 
-        if (feed.getForeignMarkup().size() > 0) {
+        if (!feed.getForeignMarkup().isEmpty()) {
             syndFeed.setForeignMarkup(feed.getForeignMarkup());
         }
 
         syndFeed.setEncoding(aFeed.getEncoding());
         syndFeed.setStyleSheet(aFeed.getStyleSheet());
-        
+
         if (aFeed.getLogo() != null) {
-            SyndImage image = new SyndImageImpl();
+            final SyndImage image = new SyndImageImpl();
             image.setUrl(aFeed.getLogo());
             syndFeed.setImage(image);
         } else if (aFeed.getIcon() != null) {
-            SyndImage image = new SyndImageImpl();
+            final SyndImage image = new SyndImageImpl();
             image.setUrl(aFeed.getIcon());
             syndFeed.setImage(image);
         }
@@ -89,16 +89,16 @@ public class ConverterForAtom03 implements Converter {
         syndFeed.setTitle(aFeed.getTitle());
 
         // use first alternate links as THE link
-        if (aFeed.getAlternateLinks() != null && aFeed.getAlternateLinks().size() > 0) {
+        if (aFeed.getAlternateLinks() != null && !aFeed.getAlternateLinks().isEmpty()) {
             final Link theLink = aFeed.getAlternateLinks().get(0);
             syndFeed.setLink(theLink.getHrefResolved());
         }
         // lump alternate and other links together
         final List<SyndLink> syndLinks = new ArrayList<SyndLink>();
-        if (aFeed.getAlternateLinks() != null && aFeed.getAlternateLinks().size() > 0) {
+        if (aFeed.getAlternateLinks() != null && !aFeed.getAlternateLinks().isEmpty()) {
             syndLinks.addAll(createSyndLinks(aFeed.getAlternateLinks()));
         }
-        if (aFeed.getOtherLinks() != null && aFeed.getOtherLinks().size() > 0) {
+        if (aFeed.getOtherLinks() != null && !aFeed.getOtherLinks().isEmpty()) {
             syndLinks.addAll(createSyndLinks(aFeed.getOtherLinks()));
         }
         syndFeed.setLinks(syndLinks);
@@ -122,7 +122,7 @@ public class ConverterForAtom03 implements Converter {
         }
 
         final List<SyndPerson> authors = aFeed.getAuthors();
-        if (authors != null && authors.size() > 0) {
+        if (authors != null && !authors.isEmpty()) {
             syndFeed.setAuthors(createSyndPersons(authors));
         }
 
@@ -175,7 +175,7 @@ public class ConverterForAtom03 implements Converter {
 
         syndEntry.setModules(ModuleUtils.cloneModules(entry.getModules()));
 
-        if (entry.getForeignMarkup().size() > 0) {
+        if (!entry.getForeignMarkup().isEmpty()) {
             syndEntry.setForeignMarkup(entry.getForeignMarkup());
         }
 
@@ -189,7 +189,7 @@ public class ConverterForAtom03 implements Converter {
 
         // Create synd enclosures from enclosure links
         final List<SyndEnclosure> syndEnclosures = new ArrayList<SyndEnclosure>();
-        if (entry.getOtherLinks() != null && entry.getOtherLinks().size() > 0) {
+        if (entry.getOtherLinks() != null && !entry.getOtherLinks().isEmpty()) {
             final List<Link> oLinks = entry.getOtherLinks();
             for (final Link link : oLinks) {
                 final Link thisLink = link;
@@ -202,10 +202,10 @@ public class ConverterForAtom03 implements Converter {
 
         // lump alternate and other links together
         final List<SyndLink> syndLinks = new ArrayList<SyndLink>();
-        if (entry.getAlternateLinks() != null && entry.getAlternateLinks().size() > 0) {
+        if (entry.getAlternateLinks() != null && !entry.getAlternateLinks().isEmpty()) {
             syndLinks.addAll(createSyndLinks(entry.getAlternateLinks()));
         }
-        if (entry.getOtherLinks() != null && entry.getOtherLinks().size() > 0) {
+        if (entry.getOtherLinks() != null && !entry.getOtherLinks().isEmpty()) {
             syndLinks.addAll(createSyndLinks(entry.getOtherLinks()));
         }
         syndEntry.setLinks(syndLinks);
@@ -220,7 +220,7 @@ public class ConverterForAtom03 implements Converter {
         Content content = entry.getSummary();
         if (content == null) {
             final List<Content> contents = entry.getContents();
-            if (contents != null && contents.size() > 0) {
+            if (contents != null && !contents.isEmpty()) {
                 content = contents.get(0);
             }
         }
@@ -232,7 +232,7 @@ public class ConverterForAtom03 implements Converter {
         }
 
         final List<Content> contents = entry.getContents();
-        if (contents.size() > 0) {
+        if (!contents.isEmpty()) {
             final List<SyndContent> sContents = new ArrayList<SyndContent>();
             for (int i = 0; i < contents.size(); i++) {
                 content = contents.get(i);
@@ -246,7 +246,7 @@ public class ConverterForAtom03 implements Converter {
         }
 
         final List<SyndPerson> authors = entry.getAuthors();
-        if (authors != null && authors.size() > 0) {
+        if (authors != null && !authors.isEmpty()) {
             syndEntry.setAuthors(createSyndPersons(authors));
             final SyndPerson person0 = syndEntry.getAuthors().get(0);
             syndEntry.setAuthor(person0.getName());
@@ -322,10 +322,10 @@ public class ConverterForAtom03 implements Converter {
             alternateLinks.add(link);
         }
 
-        if (alternateLinks.size() > 0) {
+        if (!alternateLinks.isEmpty()) {
             aFeed.setAlternateLinks(alternateLinks);
         }
-        if (otherLinks.size() > 0) {
+        if (!otherLinks.isEmpty()) {
             aFeed.setOtherLinks(otherLinks);
         }
 
@@ -339,7 +339,7 @@ public class ConverterForAtom03 implements Converter {
         aFeed.setLanguage(syndFeed.getLanguage());
 
         final List<SyndPerson> authors = syndFeed.getAuthors();
-        if (authors != null && authors.size() > 0) {
+        if (authors != null && !authors.isEmpty()) {
             aFeed.setAuthors(createAtomPersons(authors));
         }
 
@@ -443,10 +443,10 @@ public class ConverterForAtom03 implements Converter {
             }
         }
 
-        if (alternateLinks.size() > 0) {
+        if (!alternateLinks.isEmpty()) {
             aEntry.setAlternateLinks(alternateLinks);
         }
-        if (otherLinks.size() > 0) {
+        if (!otherLinks.isEmpty()) {
             aEntry.setOtherLinks(otherLinks);
         }
 
@@ -460,7 +460,7 @@ public class ConverterForAtom03 implements Converter {
         }
 
         final List<SyndContent> contents = sEntry.getContents();
-        if (contents.size() > 0) {
+        if (!contents.isEmpty()) {
             final List<Content> aContents = new ArrayList<Content>();
             for (int i = 0; i < contents.size(); i++) {
                 sContent = contents.get(i);
@@ -475,7 +475,7 @@ public class ConverterForAtom03 implements Converter {
         }
 
         final List<SyndPerson> sAuthors = sEntry.getAuthors();
-        if (sAuthors != null && sAuthors.size() > 0) {
+        if (sAuthors != null && !sAuthors.isEmpty()) {
             aEntry.setAuthors(createAtomPersons(sAuthors));
         } else if (sEntry.getAuthor() != null) {
             final Person person = new Person();
diff --git a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForAtom10.java b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForAtom10.java
index 9f42648..2d5d396 100644
--- a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForAtom10.java
+++ b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForAtom10.java
@@ -69,19 +69,19 @@ public class ConverterForAtom10 implements Converter {
 
         syndFeed.setModules(ModuleUtils.cloneModules(aFeed.getModules()));
 
-        if (feed.getForeignMarkup().size() > 0) {
+        if (!feed.getForeignMarkup().isEmpty()) {
             syndFeed.setForeignMarkup(feed.getForeignMarkup());
         }
 
         syndFeed.setEncoding(aFeed.getEncoding());
         syndFeed.setStyleSheet(aFeed.getStyleSheet());
-        
+
         if (aFeed.getLogo() != null) {
-            SyndImage image = new SyndImageImpl();
+            final SyndImage image = new SyndImageImpl();
             image.setUrl(aFeed.getLogo());
             syndFeed.setImage(image);
         } else if (aFeed.getIcon() != null) {
-            SyndImage image = new SyndImageImpl();
+            final SyndImage image = new SyndImageImpl();
             image.setUrl(aFeed.getIcon());
             syndFeed.setImage(image);
         }
@@ -105,16 +105,16 @@ public class ConverterForAtom10 implements Converter {
         }
 
         // use first alternate links as THE link
-        if (aFeed.getAlternateLinks() != null && aFeed.getAlternateLinks().size() > 0) {
+        if (aFeed.getAlternateLinks() != null && !aFeed.getAlternateLinks().isEmpty()) {
             final Link theLink = aFeed.getAlternateLinks().get(0);
             syndFeed.setLink(theLink.getHrefResolved());
         }
         // lump alternate and other links together
         final List<SyndLink> syndLinks = new ArrayList<SyndLink>();
-        if (aFeed.getAlternateLinks() != null && aFeed.getAlternateLinks().size() > 0) {
+        if (aFeed.getAlternateLinks() != null && !aFeed.getAlternateLinks().isEmpty()) {
             syndLinks.addAll(createSyndLinks(aFeed.getAlternateLinks()));
         }
-        if (aFeed.getOtherLinks() != null && aFeed.getOtherLinks().size() > 0) {
+        if (aFeed.getOtherLinks() != null && !aFeed.getOtherLinks().isEmpty()) {
             syndLinks.addAll(createSyndLinks(aFeed.getOtherLinks()));
         }
         syndFeed.setLinks(syndLinks);
@@ -128,12 +128,12 @@ public class ConverterForAtom10 implements Converter {
         // over DC equivalent info.
 
         final List<SyndPerson> authors = aFeed.getAuthors();
-        if (authors != null && authors.size() > 0) {
+        if (authors != null && !authors.isEmpty()) {
             syndFeed.setAuthors(ConverterForAtom03.createSyndPersons(authors));
         }
 
         final List<SyndPerson> contributors = aFeed.getContributors();
-        if (contributors != null && contributors.size() > 0) {
+        if (contributors != null && !contributors.isEmpty()) {
             syndFeed.setContributors(ConverterForAtom03.createSyndPersons(contributors));
         }
 
@@ -174,7 +174,7 @@ public class ConverterForAtom10 implements Converter {
         }
         syndEntry.setModules(ModuleUtils.cloneModules(entry.getModules()));
 
-        if (entry.getForeignMarkup().size() > 0) {
+        if (!entry.getForeignMarkup().isEmpty()) {
             syndEntry.setForeignMarkup(entry.getForeignMarkup());
         }
 
@@ -189,7 +189,7 @@ public class ConverterForAtom10 implements Converter {
         }
 
         final List<Content> contents = entry.getContents();
-        if (contents != null && contents.size() > 0) {
+        if (contents != null && !contents.isEmpty()) {
             final List<SyndContent> sContents = new ArrayList<SyndContent>();
             for (final Content content2 : contents) {
                 final Content content = content2;
@@ -199,14 +199,14 @@ public class ConverterForAtom10 implements Converter {
         }
 
         final List<SyndPerson> authors = entry.getAuthors();
-        if (authors != null && authors.size() > 0) {
+        if (authors != null && !authors.isEmpty()) {
             syndEntry.setAuthors(ConverterForAtom03.createSyndPersons(authors));
             final SyndPerson person0 = syndEntry.getAuthors().get(0);
             syndEntry.setAuthor(person0.getName());
         }
 
         final List<SyndPerson> contributors = entry.getContributors();
-        if (contributors != null && contributors.size() > 0) {
+        if (contributors != null && !contributors.isEmpty()) {
             syndEntry.setContributors(ConverterForAtom03.createSyndPersons(contributors));
         }
 
@@ -236,14 +236,14 @@ public class ConverterForAtom10 implements Converter {
         }
 
         // use first alternate link as THE link
-        if (entry.getAlternateLinks() != null && entry.getAlternateLinks().size() > 0) {
+        if (entry.getAlternateLinks() != null && !entry.getAlternateLinks().isEmpty()) {
             final Link theLink = entry.getAlternateLinks().get(0);
             syndEntry.setLink(theLink.getHrefResolved());
         }
 
         // Create synd enclosures from enclosure links
         final List<SyndEnclosure> syndEnclosures = new ArrayList<SyndEnclosure>();
-        if (entry.getOtherLinks() != null && entry.getOtherLinks().size() > 0) {
+        if (entry.getOtherLinks() != null && !entry.getOtherLinks().isEmpty()) {
             final List<Link> oLinks = entry.getOtherLinks();
             for (final Link link : oLinks) {
                 final Link thisLink = link;
@@ -256,10 +256,10 @@ public class ConverterForAtom10 implements Converter {
 
         // lump alternate and other links together
         final List<SyndLink> syndLinks = new ArrayList<SyndLink>();
-        if (entry.getAlternateLinks() != null && entry.getAlternateLinks().size() > 0) {
+        if (entry.getAlternateLinks() != null && !entry.getAlternateLinks().isEmpty()) {
             syndLinks.addAll(createSyndLinks(entry.getAlternateLinks()));
         }
-        if (entry.getOtherLinks() != null && entry.getOtherLinks().size() > 0) {
+        if (entry.getOtherLinks() != null && !entry.getOtherLinks().isEmpty()) {
             syndLinks.addAll(createSyndLinks(entry.getOtherLinks()));
         }
         syndEntry.setLinks(syndLinks);
@@ -369,10 +369,10 @@ public class ConverterForAtom10 implements Converter {
             link.setHref(syndFeed.getLink());
             alternateLinks.add(link);
         }
-        if (alternateLinks.size() > 0) {
+        if (!alternateLinks.isEmpty()) {
             aFeed.setAlternateLinks(alternateLinks);
         }
-        if (otherLinks.size() > 0) {
+        if (!otherLinks.isEmpty()) {
             aFeed.setOtherLinks(otherLinks);
         }
 
@@ -388,17 +388,17 @@ public class ConverterForAtom10 implements Converter {
                 aCats.add(aCat);
             }
         }
-        if (aCats.size() > 0) {
+        if (!aCats.isEmpty()) {
             aFeed.setCategories(aCats);
         }
 
         final List<SyndPerson> authors = syndFeed.getAuthors();
-        if (authors != null && authors.size() > 0) {
+        if (authors != null && !authors.isEmpty()) {
             aFeed.setAuthors(ConverterForAtom03.createAtomPersons(authors));
         }
 
         final List<SyndPerson> contributors = syndFeed.getContributors();
-        if (contributors != null && contributors.size() > 0) {
+        if (contributors != null && !contributors.isEmpty()) {
             aFeed.setContributors(ConverterForAtom03.createAtomPersons(contributors));
         }
 
@@ -411,7 +411,7 @@ public class ConverterForAtom10 implements Converter {
             aFeed.setEntries(createAtomEntries(sEntries));
         }
 
-        if (syndFeed.getForeignMarkup().size() > 0) {
+        if (!syndFeed.getForeignMarkup().isEmpty()) {
             aFeed.setForeignMarkup(syndFeed.getForeignMarkup());
         }
         return aFeed;
@@ -508,10 +508,10 @@ public class ConverterForAtom10 implements Converter {
                 otherLinks.add(link);
             }
         }
-        if (alternateLinks.size() > 0) {
+        if (!alternateLinks.isEmpty()) {
             aEntry.setAlternateLinks(alternateLinks);
         }
-        if (otherLinks.size() > 0) {
+        if (!otherLinks.isEmpty()) {
             aEntry.setOtherLinks(otherLinks);
         }
 
@@ -527,7 +527,7 @@ public class ConverterForAtom10 implements Converter {
                 aCats.add(aCat);
             }
         }
-        if (aCats.size() > 0) {
+        if (!aCats.isEmpty()) {
             aEntry.setCategories(aCats);
         }
 
@@ -535,7 +535,7 @@ public class ConverterForAtom10 implements Converter {
         aEntry.setContents(createAtomContents(syndContents));
 
         List<SyndPerson> authors = sEntry.getAuthors();
-        if (authors != null && authors.size() > 0) {
+        if (authors != null && !authors.isEmpty()) {
             aEntry.setAuthors(ConverterForAtom03.createAtomPersons(authors));
         } else if (sEntry.getAuthor() != null) {
             final Person person = new Person();
@@ -546,7 +546,7 @@ public class ConverterForAtom10 implements Converter {
         }
 
         final List<SyndPerson> contributors = sEntry.getContributors();
-        if (contributors != null && contributors.size() > 0) {
+        if (contributors != null && !contributors.isEmpty()) {
             aEntry.setContributors(ConverterForAtom03.createAtomPersons(contributors));
         }
 
@@ -561,7 +561,7 @@ public class ConverterForAtom10 implements Converter {
             aEntry.setUpdated(sEntry.getPublishedDate());
         }
 
-        if (sEntry.getForeignMarkup().size() > 0) {
+        if (!sEntry.getForeignMarkup().isEmpty()) {
             aEntry.setForeignMarkup(sEntry.getForeignMarkup());
         }
 
diff --git a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS090.java b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS090.java
index e30718e..2898534 100644
--- a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS090.java
+++ b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS090.java
@@ -54,7 +54,7 @@ public class ConverterForRSS090 implements Converter {
     @Override
     public void copyInto(final WireFeed feed, final SyndFeed syndFeed) {
         syndFeed.setModules(ModuleUtils.cloneModules(feed.getModules()));
-        if (feed.getForeignMarkup().size() > 0) {
+        if (!feed.getForeignMarkup().isEmpty()) {
             syndFeed.setForeignMarkup(feed.getForeignMarkup());
         }
         syndFeed.setStyleSheet(feed.getStyleSheet());
@@ -99,7 +99,7 @@ public class ConverterForRSS090 implements Converter {
 
         syndEntry.setModules(ModuleUtils.cloneModules(item.getModules()));
 
-        if (item.getForeignMarkup().size() > 0) {
+        if (!item.getForeignMarkup().isEmpty()) {
             syndEntry.setForeignMarkup(item.getForeignMarkup());
         }
 
@@ -136,7 +136,7 @@ public class ConverterForRSS090 implements Converter {
         channel.setTitle(syndFeed.getTitle());
         if (syndFeed.getLink() != null) {
             channel.setLink(syndFeed.getLink());
-        } else if (syndFeed.getLinks().size() > 0) {
+        } else if (!syndFeed.getLinks().isEmpty()) {
             channel.setLink(syndFeed.getLinks().get(0).getHref());
         }
         channel.setDescription(syndFeed.getDescription());
@@ -150,7 +150,7 @@ public class ConverterForRSS090 implements Converter {
             channel.setItems(createRSSItems(sEntries));
         }
 
-        if (syndFeed.getForeignMarkup().size() > 0) {
+        if (!syndFeed.getForeignMarkup().isEmpty()) {
             channel.setForeignMarkup(syndFeed.getForeignMarkup());
         }
         return channel;
@@ -177,7 +177,7 @@ public class ConverterForRSS090 implements Converter {
         item.setModules(ModuleUtils.cloneModules(sEntry.getModules()));
         item.setTitle(sEntry.getTitle());
         item.setLink(sEntry.getLink());
-        if (sEntry.getForeignMarkup().size() > 0) {
+        if (!sEntry.getForeignMarkup().isEmpty()) {
             item.setForeignMarkup(sEntry.getForeignMarkup());
         }
 
diff --git a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS091Userland.java b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS091Userland.java
index eb34178..bc01cb2 100644
--- a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS091Userland.java
+++ b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS091Userland.java
@@ -114,7 +114,7 @@ public class ConverterForRSS091Userland extends ConverterForRSS090 {
 
         final List<SyndContent> contents = sEntry.getContents();
 
-        if (contents != null && contents.size() > 0) {
+        if (contents != null && !contents.isEmpty()) {
             final SyndContent syndContent = contents.get(0);
             final Content cont = new Content();
             cont.setValue(syndContent.getValue());
@@ -136,7 +136,7 @@ public class ConverterForRSS091Userland extends ConverterForRSS090 {
         channel.setWebMaster(syndFeed.getWebMaster());
         channel.setGenerator(syndFeed.getGenerator());
 
-        if (syndFeed.getAuthors() != null && syndFeed.getAuthors().size() > 0) {
+        if (syndFeed.getAuthors() != null && !syndFeed.getAuthors().isEmpty()) {
             final SyndPerson author = syndFeed.getAuthors().get(0);
             channel.setManagingEditor(author.getName());
         }
diff --git a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS092.java b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS092.java
index 426053a..e542c03 100644
--- a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS092.java
+++ b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS092.java
@@ -46,7 +46,7 @@ public class ConverterForRSS092 extends ConverterForRSS091Userland {
     protected SyndEntry createSyndEntry(final Item item, final boolean preserveWireItem) {
         final SyndEntry syndEntry = super.createSyndEntry(item, preserveWireItem);
         final List<Category> cats = item.getCategories();
-        if (cats.size() > 0) {
+        if (!cats.isEmpty()) {
             final Set<SyndCategory> s = new LinkedHashSet<SyndCategory>(); // using
                                                                            // a
             // set to
@@ -68,7 +68,7 @@ public class ConverterForRSS092 extends ConverterForRSS091Userland {
             syndEntry.setCategories(new ArrayList<SyndCategory>(s)); // c
         }
         final List<Enclosure> enclosures = item.getEnclosures();
-        if (enclosures.size() > 0) {
+        if (!enclosures.isEmpty()) {
             syndEntry.setEnclosures(createSyndEnclosures(enclosures));
         }
         return syndEntry;
@@ -104,11 +104,11 @@ public class ConverterForRSS092 extends ConverterForRSS091Userland {
         final Item item = super.createRSSItem(sEntry);
 
         final List<SyndCategory> sCats = sEntry.getCategories(); // c
-        if (sCats.size() > 0) {
+        if (!sCats.isEmpty()) {
             item.setCategories(createRSSCategories(sCats));
         }
         final List<SyndEnclosure> sEnclosures = sEntry.getEnclosures();
-        if (sEnclosures.size() > 0) {
+        if (!sEnclosures.isEmpty()) {
             item.setEnclosures(createEnclosures(sEnclosures));
         }
         return item;
diff --git a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS094.java b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS094.java
index 75a6172..420d159 100644
--- a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS094.java
+++ b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS094.java
@@ -51,13 +51,13 @@ public class ConverterForRSS094 extends ConverterForRSS093 {
         final Channel channel = (Channel) feed;
         super.copyInto(channel, syndFeed);
         final List<Category> cats = channel.getCategories(); // c
-        if (cats.size() > 0) {
+        if (!cats.isEmpty()) {
             final Set<SyndCategory> s = new LinkedHashSet<SyndCategory>(); // using a
             // set to
             // remove
             // duplicates
             s.addAll(createSyndCategories(cats)); // feed native categories
-                                                  // (as
+            // (as
             // syndcat)
             s.addAll(syndFeed.getCategories()); // DC subjects (as syndcat)
             syndFeed.setCategories(new ArrayList<SyndCategory>(s));
@@ -105,7 +105,7 @@ public class ConverterForRSS094 extends ConverterForRSS093 {
     protected WireFeed createRealFeed(final String type, final SyndFeed syndFeed) {
         final Channel channel = (Channel) super.createRealFeed(type, syndFeed);
         final List<SyndCategory> cats = syndFeed.getCategories(); // c
-        if (cats.size() > 0) {
+        if (!cats.isEmpty()) {
             channel.setCategories(createRSSCategories(cats));
         }
         return channel;
@@ -114,7 +114,7 @@ public class ConverterForRSS094 extends ConverterForRSS093 {
     @Override
     protected Item createRSSItem(final SyndEntry sEntry) {
         final Item item = super.createRSSItem(sEntry);
-        if (sEntry.getAuthors() != null && sEntry.getAuthors().size() > 0) {
+        if (sEntry.getAuthors() != null && !sEntry.getAuthors().isEmpty()) {
             final SyndPerson author = sEntry.getAuthors().get(0);
             item.setAuthor(author.getEmail());
         }
diff --git a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS10.java b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS10.java
index 4f97832..b8df996 100644
--- a/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS10.java
+++ b/src/main/java/com/sun/syndication/feed/synd/impl/ConverterForRSS10.java
@@ -107,7 +107,7 @@ public class ConverterForRSS10 extends ConverterForRSS090 {
             item.setDescription(createItemDescription(desc));
         }
         final List<SyndContent> contents = sEntry.getContents();
-        if (contents != null && contents.size() > 0) {
+        if (contents != null && !contents.isEmpty()) {
             item.setContent(createItemContent(contents.get(0)));
         }
 
diff --git a/src/main/java/com/sun/syndication/io/impl/Atom03Generator.java b/src/main/java/com/sun/syndication/io/impl/Atom03Generator.java
index 5097c72..23d599a 100644
--- a/src/main/java/com/sun/syndication/io/impl/Atom03Generator.java
+++ b/src/main/java/com/sun/syndication/io/impl/Atom03Generator.java
@@ -38,9 +38,9 @@ import com.sun.syndication.io.FeedException;
 /**
  * Feed Generator for Atom
  * <p/>
- * 
+ *
  * @author Elaine Chien
- * 
+ *
  */
 
 public class Atom03Generator extends BaseWireFeedGenerator {
@@ -133,7 +133,7 @@ public class Atom03Generator extends BaseWireFeedGenerator {
         for (int i = 0; i < links.size(); i++) {
             eFeed.addContent(generateLinkElement(links.get(i)));
         }
-        if (feed.getAuthors() != null && feed.getAuthors().size() > 0) {
+        if (feed.getAuthors() != null && !feed.getAuthors().isEmpty()) {
             final Element authorElement = new Element("author", getFeedNamespace());
             fillPersonElement(authorElement, feed.getAuthors().get(0));
             eFeed.addContent(authorElement);
@@ -193,7 +193,7 @@ public class Atom03Generator extends BaseWireFeedGenerator {
             eEntry.addContent(generateLinkElement(links.get(i)));
         }
 
-        if (entry.getAuthors() != null && entry.getAuthors().size() > 0) {
+        if (entry.getAuthors() != null && !entry.getAuthors().isEmpty()) {
             final Element authorElement = new Element("author", getFeedNamespace());
             fillPersonElement(authorElement, entry.getAuthors().get(0));
             eEntry.addContent(authorElement);
diff --git a/src/main/java/com/sun/syndication/io/impl/Atom03Parser.java b/src/main/java/com/sun/syndication/io/impl/Atom03Parser.java
index fc1e547..83ffcba 100644
--- a/src/main/java/com/sun/syndication/io/impl/Atom03Parser.java
+++ b/src/main/java/com/sun/syndication/io/impl/Atom03Parser.java
@@ -101,7 +101,7 @@ public class Atom03Parser extends BaseWireFeedParser {
         }
 
         eList = eFeed.getChildren("contributor", getAtomNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             feed.setContributors(parsePersons(eList));
         }
 
@@ -148,12 +148,12 @@ public class Atom03Parser extends BaseWireFeedParser {
         feed.setModules(parseFeedModules(eFeed, locale));
 
         eList = eFeed.getChildren("entry", getAtomNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             feed.setEntries(parseEntries(eList, locale));
         }
 
         final List<Element> foreignMarkup = extractForeignMarkup(eFeed, feed, getAtomNamespace());
-        if (foreignMarkup.size() > 0) {
+        if (!foreignMarkup.isEmpty()) {
             feed.setForeignMarkup(foreignMarkup);
         }
         return feed;
@@ -192,7 +192,7 @@ public class Atom03Parser extends BaseWireFeedParser {
                 }
             }
         }
-        if (links.size() > 0) {
+        if (!links.isEmpty()) {
             return links;
         } else {
             return null;
@@ -232,7 +232,7 @@ public class Atom03Parser extends BaseWireFeedParser {
         for (int i = 0; i < ePersons.size(); i++) {
             persons.add(parsePerson(ePersons.get(i)));
         }
-        if (persons.size() > 0) {
+        if (!persons.isEmpty()) {
             return persons;
         } else {
             return null;
@@ -282,7 +282,7 @@ public class Atom03Parser extends BaseWireFeedParser {
         for (int i = 0; i < eEntries.size(); i++) {
             entries.add(parseEntry(eEntries.get(i), locale));
         }
-        if (entries.size() > 0) {
+        if (!entries.isEmpty()) {
             return entries;
         } else {
             return null;
@@ -309,7 +309,7 @@ public class Atom03Parser extends BaseWireFeedParser {
         }
 
         eList = eEntry.getChildren("contributor", getAtomNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             entry.setContributors(parsePersons(eList));
         }
 
@@ -339,7 +339,7 @@ public class Atom03Parser extends BaseWireFeedParser {
         }
 
         eList = eEntry.getChildren("content", getAtomNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             final List<Content> content = new ArrayList<Content>();
             for (int i = 0; i < eList.size(); i++) {
                 content.add(parseContent(eList.get(i)));
@@ -350,7 +350,7 @@ public class Atom03Parser extends BaseWireFeedParser {
         entry.setModules(parseItemModules(eEntry, locale));
 
         final List<Element> foreignMarkup = extractForeignMarkup(eEntry, entry, getAtomNamespace());
-        if (foreignMarkup.size() > 0) {
+        if (!foreignMarkup.isEmpty()) {
             entry.setForeignMarkup(foreignMarkup);
         }
         return entry;
diff --git a/src/main/java/com/sun/syndication/io/impl/Atom10Generator.java b/src/main/java/com/sun/syndication/io/impl/Atom10Generator.java
index a9faf0e..ad4788b 100644
--- a/src/main/java/com/sun/syndication/io/impl/Atom10Generator.java
+++ b/src/main/java/com/sun/syndication/io/impl/Atom10Generator.java
@@ -44,10 +44,10 @@ import com.sun.syndication.io.WireFeedOutput;
 /**
  * Feed Generator for Atom
  * <p/>
- * 
+ *
  * @author Elaine Chien
  * @author Dave Johnson (updated for Atom 1.0)
- * 
+ *
  */
 
 public class Atom10Generator extends BaseWireFeedGenerator {
@@ -159,7 +159,7 @@ public class Atom10Generator extends BaseWireFeedGenerator {
         }
 
         final List<SyndPerson> authors = feed.getAuthors();
-        if (authors != null && authors.size() > 0) {
+        if (authors != null && !authors.isEmpty()) {
             for (int i = 0; i < authors.size(); i++) {
                 final Element authorElement = new Element("author", getFeedNamespace());
                 fillPersonElement(authorElement, feed.getAuthors().get(i));
@@ -168,7 +168,7 @@ public class Atom10Generator extends BaseWireFeedGenerator {
         }
 
         final List<SyndPerson> contributors = feed.getContributors();
-        if (contributors != null && contributors.size() > 0) {
+        if (contributors != null && !contributors.isEmpty()) {
             for (int i = 0; i < contributors.size(); i++) {
                 final Element contributorElement = new Element("contributor", getFeedNamespace());
                 fillPersonElement(contributorElement, contributors.get(i));
@@ -236,7 +236,7 @@ public class Atom10Generator extends BaseWireFeedGenerator {
         }
 
         final List<SyndPerson> authors = entry.getAuthors();
-        if (authors != null && authors.size() > 0) {
+        if (authors != null && !authors.isEmpty()) {
             for (int i = 0; i < authors.size(); i++) {
                 final Element authorElement = new Element("author", getFeedNamespace());
                 fillPersonElement(authorElement, entry.getAuthors().get(i));
@@ -245,7 +245,7 @@ public class Atom10Generator extends BaseWireFeedGenerator {
         }
 
         final List<SyndPerson> contributors = entry.getContributors();
-        if (contributors != null && contributors.size() > 0) {
+        if (contributors != null && !contributors.isEmpty()) {
             for (int i = 0; i < contributors.size(); i++) {
                 final Element contributorElement = new Element("contributor", getFeedNamespace());
                 fillPersonElement(contributorElement, contributors.get(i));
@@ -268,7 +268,7 @@ public class Atom10Generator extends BaseWireFeedGenerator {
             eEntry.addContent(publishedElement);
         }
 
-        if (entry.getContents() != null && entry.getContents().size() > 0) {
+        if (entry.getContents() != null && !entry.getContents().isEmpty()) {
             final Element contentElement = new Element("content", getFeedNamespace());
             final Content content = entry.getContents().get(0);
             fillContentElement(contentElement, content);
diff --git a/src/main/java/com/sun/syndication/io/impl/Atom10Parser.java b/src/main/java/com/sun/syndication/io/impl/Atom10Parser.java
index fcb4366..713e481 100644
--- a/src/main/java/com/sun/syndication/io/impl/Atom10Parser.java
+++ b/src/main/java/com/sun/syndication/io/impl/Atom10Parser.java
@@ -123,12 +123,12 @@ public class Atom10Parser extends BaseWireFeedParser {
         feed.setModules(parseFeedModules(eFeed, locale));
 
         final List<Element> eList = eFeed.getChildren("entry", getAtomNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             feed.setEntries(parseEntries(feed, baseURI, eList, locale));
         }
 
         final List<Element> foreignMarkup = extractForeignMarkup(eFeed, feed, getAtomNamespace());
-        if (foreignMarkup.size() > 0) {
+        if (!foreignMarkup.isEmpty()) {
             feed.setForeignMarkup(foreignMarkup);
         }
         return feed;
@@ -153,12 +153,12 @@ public class Atom10Parser extends BaseWireFeedParser {
         feed.setCategories(parseCategories(baseURI, cList));
 
         eList = eFeed.getChildren("author", getAtomNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             feed.setAuthors(parsePersons(baseURI, eList, locale));
         }
 
         eList = eFeed.getChildren("contributor", getAtomNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             feed.setContributors(parsePersons(baseURI, eList, locale));
         }
 
@@ -258,7 +258,7 @@ public class Atom10Parser extends BaseWireFeedParser {
                 links.add(link);
             }
         }
-        if (links.size() > 0) {
+        if (!links.isEmpty()) {
             return links;
         } else {
             return null;
@@ -274,7 +274,7 @@ public class Atom10Parser extends BaseWireFeedParser {
                 links.add(link);
             }
         }
-        if (links.size() > 0) {
+        if (!links.isEmpty()) {
             return links;
         } else {
             return null;
@@ -308,7 +308,7 @@ public class Atom10Parser extends BaseWireFeedParser {
         for (int i = 0; i < ePersons.size(); i++) {
             persons.add(parsePerson(baseURI, ePersons.get(i), locale));
         }
-        if (persons.size() > 0) {
+        if (!persons.isEmpty()) {
             return persons;
         } else {
             return null;
@@ -358,7 +358,7 @@ public class Atom10Parser extends BaseWireFeedParser {
         for (int i = 0; i < eEntries.size(); i++) {
             entries.add(this.parseEntry(feed, eEntries.get(i), baseURI, locale));
         }
-        if (entries.size() > 0) {
+        if (!entries.isEmpty()) {
             return entries;
         } else {
             return null;
@@ -386,12 +386,12 @@ public class Atom10Parser extends BaseWireFeedParser {
         entry.setOtherLinks(parseOtherLinks(feed, entry, baseURI, eList));
 
         eList = eEntry.getChildren("author", getAtomNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             entry.setAuthors(parsePersons(baseURI, eList, locale));
         }
 
         eList = eEntry.getChildren("contributor", getAtomNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             entry.setContributors(parsePersons(baseURI, eList, locale));
         }
 
@@ -439,7 +439,7 @@ public class Atom10Parser extends BaseWireFeedParser {
         entry.setModules(parseItemModules(eEntry, locale));
 
         final List<Element> foreignMarkup = extractForeignMarkup(eEntry, entry, getAtomNamespace());
-        if (foreignMarkup.size() > 0) {
+        if (!foreignMarkup.isEmpty()) {
             entry.setForeignMarkup(foreignMarkup);
         }
         return entry;
@@ -451,7 +451,7 @@ public class Atom10Parser extends BaseWireFeedParser {
             final Element eCategory = eCategories.get(i);
             cats.add(parseCategory(baseURI, eCategory));
         }
-        if (cats.size() > 0) {
+        if (!cats.isEmpty()) {
             return cats;
         } else {
             return null;
diff --git a/src/main/java/com/sun/syndication/io/impl/DCModuleParser.java b/src/main/java/com/sun/syndication/io/impl/DCModuleParser.java
index c999507..40d24ea 100644
--- a/src/main/java/com/sun/syndication/io/impl/DCModuleParser.java
+++ b/src/main/java/com/sun/syndication/io/impl/DCModuleParser.java
@@ -75,77 +75,77 @@ public class DCModuleParser implements ModuleParser {
         final DCModule dcm = new DCModuleImpl();
 
         List<Element> eList = dcRoot.getChildren("title", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setTitles(parseElementList(eList));
         }
         eList = dcRoot.getChildren("creator", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setCreators(parseElementList(eList));
         }
         eList = dcRoot.getChildren("subject", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setSubjects(parseSubjects(eList));
         }
         eList = dcRoot.getChildren("description", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setDescriptions(parseElementList(eList));
         }
         eList = dcRoot.getChildren("publisher", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setPublishers(parseElementList(eList));
         }
         eList = dcRoot.getChildren("contributor", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setContributors(parseElementList(eList));
         }
         eList = dcRoot.getChildren("date", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setDates(parseElementListDate(eList, locale));
         }
         eList = dcRoot.getChildren("type", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setTypes(parseElementList(eList));
         }
         eList = dcRoot.getChildren("format", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setFormats(parseElementList(eList));
         }
         eList = dcRoot.getChildren("identifier", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setIdentifiers(parseElementList(eList));
         }
         eList = dcRoot.getChildren("source", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setSources(parseElementList(eList));
         }
         eList = dcRoot.getChildren("language", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setLanguages(parseElementList(eList));
         }
         eList = dcRoot.getChildren("relation", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setRelations(parseElementList(eList));
         }
         eList = dcRoot.getChildren("coverage", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setCoverages(parseElementList(eList));
         }
         eList = dcRoot.getChildren("rights", getDCNamespace());
-        if (eList.size() > 0) {
+        if (!eList.isEmpty()) {
             foundSomething = true;
             dcm.setRightsList(parseElementList(eList));
         }
diff --git a/src/main/java/com/sun/syndication/io/impl/RSS090Parser.java b/src/main/java/com/sun/syndication/io/impl/RSS090Parser.java
index 32736c9..24d9bb1 100644
--- a/src/main/java/com/sun/syndication/io/impl/RSS090Parser.java
+++ b/src/main/java/com/sun/syndication/io/impl/RSS090Parser.java
@@ -186,7 +186,7 @@ public class RSS090Parser extends BaseWireFeedParser {
         channel.setItems(parseItems(rssRoot, locale));
 
         final List<Element> foreignMarkup = extractForeignMarkup(eChannel, channel, getRSSNamespace());
-        if (foreignMarkup.size() > 0) {
+        if (!foreignMarkup.isEmpty()) {
             channel.setForeignMarkup(foreignMarkup);
         }
         return channel;
diff --git a/src/main/java/com/sun/syndication/io/impl/RSS091UserlandGenerator.java b/src/main/java/com/sun/syndication/io/impl/RSS091UserlandGenerator.java
index 74d9b42..c2a179f 100644
--- a/src/main/java/com/sun/syndication/io/impl/RSS091UserlandGenerator.java
+++ b/src/main/java/com/sun/syndication/io/impl/RSS091UserlandGenerator.java
@@ -231,13 +231,13 @@ public class RSS091UserlandGenerator extends RSS090Generator {
 
         final List<Integer> skipHours = channel.getSkipHours();
 
-        if (skipHours != null && skipHours.size() > 0) {
+        if (skipHours != null && !skipHours.isEmpty()) {
             eChannel.addContent(generateSkipHoursElement(skipHours));
         }
 
         final List<String> skipDays = channel.getSkipDays();
 
-        if (skipDays != null && skipDays.size() > 0) {
+        if (skipDays != null && !skipDays.isEmpty()) {
             eChannel.addContent(generateSkipDaysElement(skipDays));
         }
     }
diff --git a/src/main/java/com/sun/syndication/io/impl/RSS092Generator.java b/src/main/java/com/sun/syndication/io/impl/RSS092Generator.java
index 12debc3..6ec0b4a 100644
--- a/src/main/java/com/sun/syndication/io/impl/RSS092Generator.java
+++ b/src/main/java/com/sun/syndication/io/impl/RSS092Generator.java
@@ -84,7 +84,7 @@ public class RSS092Generator extends RSS091UserlandGenerator {
 
     // Another one to thanks DW for
     protected int getNumberOfEnclosures(final List<Enclosure> enclosures) {
-        if (enclosures.size() > 0) {
+        if (!enclosures.isEmpty()) {
             return 1;
         } else {
             return 0;
diff --git a/src/main/java/com/sun/syndication/io/impl/RSS092Parser.java b/src/main/java/com/sun/syndication/io/impl/RSS092Parser.java
index b3c6044..a8d066c 100644
--- a/src/main/java/com/sun/syndication/io/impl/RSS092Parser.java
+++ b/src/main/java/com/sun/syndication/io/impl/RSS092Parser.java
@@ -117,7 +117,7 @@ public class RSS092Parser extends RSS091UserlandParser {
         // WHY
         // DOESN'T
         // WORK
-        if (eEnclosures.size() > 0) {
+        if (!eEnclosures.isEmpty()) {
             final List<Enclosure> enclosures = new ArrayList<Enclosure>();
             for (int i = 0; i < eEnclosures.size(); i++) {
                 e = eEnclosures.get(i);
@@ -153,7 +153,7 @@ public class RSS092Parser extends RSS091UserlandParser {
 
     protected List<Category> parseCategories(final List<Element> eCats) {
         List<Category> cats = null;
-        if (eCats.size() > 0) {
+        if (!eCats.isEmpty()) {
             cats = new ArrayList<Category>();
             for (int i = 0; i < eCats.size(); i++) {
                 final Category cat = new Category();
diff --git a/src/main/java/com/sun/syndication/io/impl/RSS10Generator.java b/src/main/java/com/sun/syndication/io/impl/RSS10Generator.java
index 2d541a0..a43d222 100644
--- a/src/main/java/com/sun/syndication/io/impl/RSS10Generator.java
+++ b/src/main/java/com/sun/syndication/io/impl/RSS10Generator.java
@@ -59,7 +59,7 @@ public class RSS10Generator extends RSS090Generator {
             eChannel.setAttribute("about", channel.getUri(), getRDFNamespace());
         }
         final List<Item> items = channel.getItems();
-        if (items.size() > 0) {
+        if (!items.isEmpty()) {
             final Element eItems = new Element("items", getFeedNamespace());
             final Element eSeq = new Element("Seq", getRDFNamespace());
             for (int i = 0; i < items.size(); i++) {