Drop comparison with empty rtl::OUString

framework/source/fwi/helper/mischelper.cxx

@@ -162,7 +162,7 @@ void FillLangItems( std::set< OUString > &rLangItems,
     rLangItems.clear();
 
     //1--add current language
-    if( rCurLang != OUString() &&
+    if( !rCurLang.isEmpty() &&
         LANGUAGE_DONTKNOW != rLanguageTable.GetType( rCurLang ))
         rLangItems.insert( rCurLang );
 
@@ -195,7 +195,7 @@ void FillLangItems( std::set< OUString > &rLangItems,
     }
 
     //5--keyboard language
-    if( rKeyboardLang != OUString())
+    if( !rKeyboardLang.isEmpty() )
     {
         if ( IsScriptTypeMatchingToLanguage( nScriptType, rLanguageTable.GetType( rKeyboardLang )))
             rLangItems.insert( rKeyboardLang );

jvmfwk/plugins/sunmajor/pluginlib/util.cxx

@@ -1188,7 +1188,7 @@ void createJavaInfoDirScan(vector<rtl::Reference<VendorBase> >& vecInfos)
             {
                 OUString usDir2(usDir1 + arCollectDirs[j]);
                 // prevent that we scan the whole /usr, /usr/lib, etc directories
-                if (arCollectDirs[j] != OUString())
+                if (!arCollectDirs[j].isEmpty())
                 {
                     //usr/java/xxx
                     //Examin every subdirectory

sw/source/ui/lingu/olmenu.cxx

@@ -225,7 +225,7 @@ void SwSpellPopup::fillLangPopupMenu(
     OUString    aKeyboardLang( aSeq[2] );
     OUString    aGuessedTextLang( aSeq[3] );
 
-    if (aCurLang != OUString() &&
+    if (!aCurLang.isEmpty() &&
         LANGUAGE_DONTKNOW != aLanguageTable.GetType( aCurLang ))
         aLangItems.insert( aCurLang );
 

ucb/source/ucp/file/bc.cxx

@@ -603,7 +603,7 @@ BaseContent::addProperty(
            lang::IllegalArgumentException,
            RuntimeException)
 {
-    if( ( m_nState & JustInserted ) || ( m_nState & Deleted ) || Name == rtl::OUString() )
+    if( ( m_nState & JustInserted ) || ( m_nState & Deleted ) || Name.isEmpty() )
     {
         throw lang::IllegalArgumentException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >(), 0 );
     }