Summary

Update core libraries for JDK 24 by adding an enum constant to ClassFileFormatVersion and constant to ClassFile.

Problem

With a new release, ClassFileFormatVersion and ClassFile need a constants to model that release.

Solution

Add the new constant.

Specification

diff --git a/src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java b/src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java
index 16c57a9463e..72abe96a559 100644
--- a/src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java
+++ b/src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 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
@@ -306,6 +306,18 @@ public enum ClassFileFormatVersion {
      * <cite>The Java Virtual Machine Specification, Java SE 23 Edition</cite></a>
      */
     RELEASE_23(67),
+
+    /**
+     * The version introduced by the Java Platform, Standard Edition
+     * 24.
+     *
+     * @since 24
+     *
+     * @see <a
+     * href="https://docs.oracle.com/javase/specs/jvms/se24/html/index.html">
+     * <cite>The Java Virtual Machine Specification, Java SE 24 Edition</cite></a>
+     */
+    RELEASE_24(68),
     ; // Reduce code churn when appending new constants

     // Note to maintainers: when adding constants for newer releases,
@@ -321,7 +333,7 @@ private ClassFileFormatVersion(int major) {
      * {@return the latest class file format version}
      */
     public static ClassFileFormatVersion latest() {
-        return RELEASE_23;
+        return RELEASE_24;
     }

     /**


--- a/src/java.base/share/classes/java/lang/classfile/ClassFile.java
+++ b/src/java.base/share/classes/java/lang/classfile/ClassFile.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 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
@@ -1478,6 +1478,12 @@ default List<VerifyError> verify(Path path) throws IOException {
     /** 67 */
     int JAVA_23_VERSION = 67;

+    /**
+     * The class major version of JAVA_24.
+     * @since 24
+     */
+    int JAVA_24_VERSION = 68;
+