src/hotspot/share/oops/instanceKlass.cpp

@@ -2640,13 +2640,18 @@
     // If the interface isn't implemented by the receiver class,
     // the VM should throw IncompatibleClassChangeError.
     if (cnt >= nof_interfaces) {
       ResourceMark rm(THREAD);
       stringStream ss;
+      bool same_module = (module() == holder->module());      
       ss.print("Receiver class %s does not implement "
-               "the interface %s defining the method to be called",
-               class_loader_and_module_name(), holder->class_loader_and_module_name());
+               "the interface %s defining the method to be called "
+               "(%s%s%s)",
+               external_name(), holder->external_name(),
+               (same_module) ? joint_in_module_of_loader(holder) : class_in_module_of_loader(),
+               (same_module) ? "" : "; ",
+               (same_module) ? "" : holder->class_in_module_of_loader());
       THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
     }
 
     Klass* ik = ioe->interface_klass();
     if (ik == holder) break;