src/java.base/share/classes/java/io/ObjectInputStream.java

*** 1319,1328 ****
--- 1319,1332 ----
  
      /**
       * Provide access to the persistent fields read from the input stream.
       */
      public abstract static class GetField {
+         /**
+          * Constructor for subclasses to call.
+          */
+         public GetField() {}
  
          /**
           * Get the ObjectStreamClass that describes the fields in the stream.
           *
           * @return  the descriptor class that describes the serializable fields