--- a/langtools/test/tools/javac/diags/CheckResourceKeys.java	Tue Nov 06 14:45:27 2012 +0000
+++ b/langtools/test/tools/javac/diags/CheckResourceKeys.java	Tue Nov 06 14:32:49 2012 -0800
@@ -310,9 +310,9 @@
                     pkg, EnumSet.of(JavaFileObject.Kind.CLASS), true)) {
                 String name = fo.getName();
                 // ignore resource files, and files which are not really part of javac
-                if (name.contains("resources")
-                        || name.contains("Launcher.class")
-                        || name.contains("CreateSymbols.class"))
+                if (name.matches(".*resources.[A-Za-z_0-9]+\\.class")
+                        || name.endsWith("Launcher.class")
+                        || name.endsWith("CreateSymbols.class"))
                     continue;
                 scan(fo, results);
             }