src/java.base/share/classes/jdk/internal/misc/JavaLangAccess.java

*** 252,257 ****
--- 252,276 ----
      /**
       * Returns a stream of the layers that have modules defined to the
       * given class loader.
       */
      Stream<ModuleLayer> layers(ClassLoader loader);
+ 
+     /**
+      * Returns a new string by decoding from the given utf8 bytes array.
+      *
+      * @param off the index of the first byte to decode
+      * @param len the number of bytes to decode
+      * @return the newly created string
+      * @throws IllegalArgumentException for malformed or unmappable bytes.
+      */
+     String newStringUTF8NoRepl(byte[] bytes, int off, int len);
+ 
+     /**
+      * Encode the given string into a sequence of bytes using utf8.
+      *
+      * @param s the string to encode
+      * @return the encoded bytes in utf8
+      * @throws IllegalArgumentException for malformed surrogates
+      */
+     byte[] getBytesUTF8NoRepl(String s);
  }