src/hotspot/share/classfile/javaClasses.hpp

*** 320,329 ****
--- 320,333 ----
    static void set_module(oop java_class, oop module);
    static oop module(oop java_class);
  
    static void set_box_mirror(oop java_class, oop mirror);
    static oop box_mirror(oop java_class);
+   static bool is_box_type(oop java_class) { // Must match "Class.isBoxType()"
+     return box_mirror(java_class) == NULL || oopDesc::equals(box_mirror(java_class), java_class);
+   }
+ 
    static void set_value_mirror(oop java_class, oop mirror);
    static oop value_mirror(oop java_class);
  
    static oop name(Handle java_class, TRAPS);