src/java.base/share/classes/java/util/StringJoiner.java

*** 75,85 ****
  
      /** Total length in chars so far, excluding prefix and suffix. */
      private int len;
  
      /**
!      * When overridden by the user to be non-null via {@link setEmptyValue}, the
       * string returned by toString() when no elements have yet been added.
       * When null, prefix + suffix is used as the empty value.
       */
      private String emptyValue;
  
--- 75,85 ----
  
      /** Total length in chars so far, excluding prefix and suffix. */
      private int len;
  
      /**
!      * When overridden by the user to be non-null via {@link #setEmptyValue(CharSequence)}, the
       * string returned by toString() when no elements have yet been added.
       * When null, prefix + suffix is used as the empty value.
       */
      private String emptyValue;