src/java.base/share/classes/java/lang/Math.java

*** 1077,1086 ****
--- 1077,1087 ----
       * Returns the exact mathematical product of the arguments.
       *
       * @param x the first value
       * @param y the second value
       * @return the result
+      * @since 9
       */
      public static long multiplyFull(int x, int y) {
          return (long)x * (long)y;
      }
  
*** 1089,1098 ****
--- 1090,1100 ----
       * product of two 64-bit factors.
       *
       * @param x the first value
       * @param y the second value
       * @return the result
+      * @since 9
       */
      public static long multiplyHigh(long x, long y) {
          if (x < 0 || y < 0) {
              // Use technique from section 8-2 of Henry S. Warren, Jr.,
              // Hacker's Delight (2nd ed.) (Addison Wesley, 2013), 173-174.