8355746: Start of release updates for JDK 26

8355748: Add SourceVersion.RELEASE_26
8355751: Add source 26 and target 26 to javac

Co-authored-by: Joe Darcy <[email protected]>
Reviewed-by: iris, coleenp, darcy

Author: 2 people

.jcheck/conf

@@ -1,7 +1,7 @@
 [general]
 project=jdk
 jbs=JDK
-version=25
+version=26
 
 [checks]
 error=author,committer,reviewers,merge,issues,executable,symlink,message,hg-tag,whitespace,problemlists,copyright

make/conf/version-numbers.conf

@@ -26,17 +26,17 @@
 # Default version, product, and vendor information to use,
 # unless overridden by configure
 
-DEFAULT_VERSION_FEATURE=25
+DEFAULT_VERSION_FEATURE=26
 DEFAULT_VERSION_INTERIM=0
 DEFAULT_VERSION_UPDATE=0
 DEFAULT_VERSION_PATCH=0
 DEFAULT_VERSION_EXTRA1=0
 DEFAULT_VERSION_EXTRA2=0
 DEFAULT_VERSION_EXTRA3=0
-DEFAULT_VERSION_DATE=2025-09-16
-DEFAULT_VERSION_CLASSFILE_MAJOR=69  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
+DEFAULT_VERSION_DATE=2026-03-17
+DEFAULT_VERSION_CLASSFILE_MAJOR=70  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
 DEFAULT_VERSION_CLASSFILE_MINOR=0
 DEFAULT_VERSION_DOCS_API_SINCE=11
-DEFAULT_ACCEPTABLE_BOOT_VERSIONS="24 25"
-DEFAULT_JDK_SOURCE_TARGET_VERSION=25
+DEFAULT_ACCEPTABLE_BOOT_VERSIONS="24 25 26"
+DEFAULT_JDK_SOURCE_TARGET_VERSION=26
 DEFAULT_PROMOTED_VERSION_PRE=ea

src/hotspot/share/classfile/classFileParser.cpp

@@ -154,6 +154,8 @@
 
 #define JAVA_25_VERSION                   69
 
+#define JAVA_26_VERSION                   70
+
 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
   assert((bad_constant == JVM_CONSTANT_Module ||
           bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,

src/java.base/share/classes/java/lang/classfile/ClassFile.java

@@ -1030,6 +1030,14 @@ default List<VerifyError> verify(Path path) throws IOException {
      */
     int JAVA_25_VERSION = 69;
 
+    /**
+     * The class major version introduced by Java SE 26, {@value}.
+     *
+     * @see ClassFileFormatVersion#RELEASE_26
+     * @since 26
+     */
+    int JAVA_26_VERSION = 70;
+
     /**
      * A minor version number {@value} indicating a class uses preview features
      * of a Java SE release since 12, for major versions {@value
@@ -1041,7 +1049,7 @@ default List<VerifyError> verify(Path path) throws IOException {
      * {@return the latest class major version supported by the current runtime}
      */
     static int latestMajorVersion() {
-        return JAVA_25_VERSION;
+        return JAVA_26_VERSION;
     }
 
     /**

src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java

@@ -371,6 +371,18 @@ public enum ClassFileFormatVersion {
      * <cite>The Java Virtual Machine Specification, Java SE 25 Edition</cite></a>
      */
     RELEASE_25(69),
+
+    /**
+     * The version introduced by the Java Platform, Standard Edition
+     * 26.
+     *
+     * @since 26
+     *
+     * @see <a
+     * href="https://docs.oracle.com/javase/specs/jvms/se26/html/index.html">
+     * <cite>The Java Virtual Machine Specification, Java SE 26 Edition</cite></a>
+     */
+    RELEASE_26(70),
     ; // Reduce code churn when appending new constants
 
     // Note to maintainers: when adding constants for newer releases,
@@ -386,7 +398,7 @@ private ClassFileFormatVersion(int major) {
      * {@return the latest class file format version}
      */
     public static ClassFileFormatVersion latest() {
-        return RELEASE_25;
+        return RELEASE_26;
     }
 
     /**

src/java.compiler/share/classes/javax/lang/model/SourceVersion.java

@@ -468,6 +468,18 @@ public enum SourceVersion {
      * JEP 513: Flexible Constructor Bodies</a>
      */
     RELEASE_25,
+
+    /**
+     * The version introduced by the Java Platform, Standard Edition
+     * 26.
+     *
+     * @since 26
+     *
+     * @see <a
+     * href="https://docs.oracle.com/javase/specs/jls/se26/html/index.html">
+     * <cite>The Java Language Specification, Java SE 26 Edition</cite></a>
+     */
+    RELEASE_26,
     ; // Reduce code churn when appending new constants
 
     // Note that when adding constants for newer releases, the
@@ -477,7 +489,7 @@ public enum SourceVersion {
      * {@return the latest source version that can be modeled}
      */
     public static SourceVersion latest() {
-        return RELEASE_25;
+        return RELEASE_26;
     }
 
     private static final SourceVersion latestSupported = getLatestSupported();
@@ -492,7 +504,7 @@ public static SourceVersion latest() {
     private static SourceVersion getLatestSupported() {
         int intVersion = Runtime.version().feature();
         return (intVersion >= 11) ?
-            valueOf("RELEASE_" + Math.min(25, intVersion)):
+            valueOf("RELEASE_" + Math.min(26, intVersion)):
             RELEASE_10;
     }
 

src/java.compiler/share/classes/javax/lang/model/util/AbstractAnnotationValueVisitor14.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2025, 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
@@ -44,7 +44,7 @@
  * @see AbstractAnnotationValueVisitor9
  * @since 14
  */
-@SupportedSourceVersion(RELEASE_25)
+@SupportedSourceVersion(RELEASE_26)
 public abstract class AbstractAnnotationValueVisitor14<R, P> extends AbstractAnnotationValueVisitor9<R, P> {
 
     /**

src/java.compiler/share/classes/javax/lang/model/util/AbstractAnnotationValueVisitorPreview.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2025, 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
@@ -50,7 +50,7 @@
  * @see AbstractAnnotationValueVisitor14
  * @since 23
  */
-@SupportedSourceVersion(RELEASE_25)
+@SupportedSourceVersion(RELEASE_26)
 @PreviewFeature(feature=PreviewFeature.Feature.LANGUAGE_MODEL, reflective=true)
 public abstract class AbstractAnnotationValueVisitorPreview<R, P> extends AbstractAnnotationValueVisitor14<R, P> {
 

src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitor14.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2025, 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
@@ -50,7 +50,7 @@
  * @see AbstractElementVisitor9
  * @since 16
  */
-@SupportedSourceVersion(RELEASE_25)
+@SupportedSourceVersion(RELEASE_26)
 public abstract class AbstractElementVisitor14<R, P> extends AbstractElementVisitor9<R, P> {
     /**
      * Constructor for concrete subclasses to call.

src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitorPreview.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2025, 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
@@ -53,7 +53,7 @@
  * @see AbstractElementVisitor14
  * @since 23
  */
-@SupportedSourceVersion(RELEASE_25)
+@SupportedSourceVersion(RELEASE_26)
 @PreviewFeature(feature=PreviewFeature.Feature.LANGUAGE_MODEL, reflective=true)
 public abstract class AbstractElementVisitorPreview<R, P> extends AbstractElementVisitor14<R, P> {
     /**