src/java.base/share/classes/java/math/MathContext.java

*** 62,71 ****
--- 62,72 ----
      private static final RoundingMode DEFAULT_ROUNDINGMODE = RoundingMode.HALF_UP;
      // Smallest values for digits (Maximum is Integer.MAX_VALUE)
      private static final int MIN_DIGITS = 0;
  
      // Serialization version
+     @java.io.Serial
      private static final long serialVersionUID = 5579720004786848255L;
  
      /* ----- Public Properties ----- */
      /**
       *  A {@code MathContext} object whose settings have the values
*** 307,316 ****
--- 308,318 ----
       * Reconstitute the {@code MathContext} instance from a stream (that is,
       * deserialize it).
       *
       * @param s the stream being read.
       */
+     @java.io.Serial
      private void readObject(java.io.ObjectInputStream s)
          throws java.io.IOException, ClassNotFoundException {
          s.defaultReadObject();     // read in all fields
          // validate possibly bad fields
          if (precision < MIN_DIGITS) {