src/share/vm/runtime/java.hpp

rev 8884 : imported patch 8066821.rev6

@@ -135,10 +135,18 @@
 
   static JDK_Version jdk_update(uint8_t major, uint8_t update_number) {
     return JDK_Version(major, 0, 0, update_number);
   }
 
+  static JDK_Version undefined() {
+    return JDK_Version(0);
+  }
+
+  bool is_undefined() const {
+    return (_major == 0);
+  }
+
   uint8_t major_version() const          { return _major; }
   uint8_t minor_version() const          { return _minor; }
   uint8_t micro_version() const          { return _micro; }
   uint8_t update_version() const         { return _update; }
   uint8_t special_update_version() const { return _special; }