Index: trunk/src/org/openstreetmap/josm/gui/datatransfer/ClipboardUtils.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/datatransfer/ClipboardUtils.java	(revision 11453)
+++ trunk/src/org/openstreetmap/josm/gui/datatransfer/ClipboardUtils.java	(revision 11454)
@@ -141,8 +141,8 @@
             try {
                 getClipboard().setContents(transferable, new DoNothingClipboardOwner());
-                return true;
+                return Boolean.TRUE;
             } catch (IllegalStateException ex) {
                 Main.error(ex);
-                return false;
+                return Boolean.FALSE;
             }
         });
Index: trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/ConditionFactory.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/ConditionFactory.java	(revision 11453)
+++ trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/ConditionFactory.java	(revision 11454)
@@ -197,5 +197,5 @@
                     testFloat = Float.parseFloat(test);
                 } catch (NumberFormatException e) {
-                    return false;
+                    return Boolean.FALSE;
                 }
                 float prototypeFloat = Float.parseFloat(prototype);
Index: trunk/src/org/openstreetmap/josm/tools/RightAndLefthandTraffic.java
===================================================================
--- trunk/src/org/openstreetmap/josm/tools/RightAndLefthandTraffic.java	(revision 11453)
+++ trunk/src/org/openstreetmap/josm/tools/RightAndLefthandTraffic.java	(revision 11454)
@@ -157,5 +157,5 @@
              OsmWriter w = OsmWriterFactory.createOsmWriter(new PrintWriter(writer), false, ds.getVersion())
             ) {
-            w.header(false);
+            w.header(Boolean.FALSE);
             w.writeContent(ds);
             w.footer();
Index: trunk/src/org/openstreetmap/josm/tools/Shortcut.java
===================================================================
--- trunk/src/org/openstreetmap/josm/tools/Shortcut.java	(revision 11453)
+++ trunk/src/org/openstreetmap/josm/tools/Shortcut.java	(revision 11454)
@@ -404,5 +404,5 @@
         return shortcuts.stream()
                 .map(Shortcut::save)
-                .reduce(false, Boolean::logicalOr); // has changed
+                .reduce(Boolean.FALSE, Boolean::logicalOr); // has changed
     }