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

@@ -1077,10 +1077,11 @@
      * 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;
     }
 

@@ -1089,10 +1090,11 @@
      * 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.