diff --git a/src/java.base/share/classes/java/nio/channels/Channels.java b/src/java.base/share/classes/java/nio/channels/Channels.java
index fb113938d1d..0a52958b0c6 100644
--- a/src/java.base/share/classes/java/nio/channels/Channels.java
+++ b/src/java.base/share/classes/java/nio/channels/Channels.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2024, 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
@@ -505,6 +505,8 @@ public final class Channels {
      * @param  charset The charset to be used
      *
      * @return  A new reader
+     *
+     * @since 10
      */
     public static Reader newReader(ReadableByteChannel ch, Charset charset) {
         Objects.requireNonNull(charset, "charset");
@@ -613,6 +615,8 @@ public final class Channels {
      *         The charset to be used
      *
      * @return  A new writer
+     *
+     * @since 10
      */
     public static Writer newWriter(WritableByteChannel ch, Charset charset) {
         Objects.requireNonNull(charset, "charset");
diff --git a/src/java.base/share/classes/java/util/Formatter.java b/src/java.base/share/classes/java/util/Formatter.java
index 14a850a24bd..3f37774469d 100644
--- a/src/java.base/share/classes/java/util/Formatter.java
+++ b/src/java.base/share/classes/java/util/Formatter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2023, Alibaba Group Holding Limited. All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -2299,6 +2299,8 @@ public final class Formatter implements Closeable, Flushable {
      *
      * @throws NullPointerException
      *         if {@code fileName} or {@code charset} is {@code null}.
+     *
+     * @since 10
      */
     public Formatter(String fileName, Charset charset, Locale l) throws IOException {
         this(Objects.requireNonNull(charset, "charset"), l, new File(fileName));
@@ -2443,6 +2445,8 @@ public final class Formatter implements Closeable, Flushable {
      *
      * @throws NullPointerException
      *         if {@code file} or {@code charset} is {@code null}.
+     *
+     * @since 10
      */
     public Formatter(File file, Charset charset, Locale l) throws IOException {
         this(Objects.requireNonNull(charset, "charset"), l, file);
@@ -2560,6 +2564,8 @@ public final class Formatter implements Closeable, Flushable {
      *
      * @throws NullPointerException
      *         if {@code os} or {@code charset} is {@code null}.
+     *
+     * @since 10
      */
     public Formatter(OutputStream os, Charset charset, Locale l) {
         this(l, new BufferedWriter(new OutputStreamWriter(os, charset)));