8256839: JavaDoc for java.time.Period.negated() method

Reviewed-by: rriggs, lancea, joehw, scolebourne

Author: naotoj

src/java.base/share/classes/java/time/Period.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -808,7 +808,7 @@ public Period multipliedBy(int scalar) {
      *
      * @return a {@code Period} based on this period with the amounts negated, not null
      * @throws ArithmeticException if numeric overflow occurs, which only happens if
-     *  one of the units has the value {@code Long.MIN_VALUE}
+     *  one of the units has the value {@code Integer.MIN_VALUE}
      */
     public Period negated() {
         return multipliedBy(-1);