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8344943: Mark not subclassable classes final in java.base exported classes

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Reviewed-by: weijun, liach, djelinski
This commit is contained in:
Eirik Bjørsnøs 2025-01-24 19:29:05 +00:00
parent 76f792b552
commit 8e8f800071
22 changed files with 44 additions and 47 deletions
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4
src/java.base/share/classes/java/util/Base64.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 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
@ -81,7 +81,7 @@ import jdk.internal.vm.annotation.IntrinsicCandidate;
* @since 1.8
*/
public class Base64 {
public final class Base64 {
private Base64() {}

2
src/java.base/share/classes/java/util/Collections.java
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@ -82,7 +82,7 @@ import jdk.internal.access.SharedSecrets;
* @since 1.2
*/
public class Collections {
public final class Collections {
// Suppresses default constructor, ensuring non-instantiability.
private Collections() {
}

4
src/java.base/share/classes/java/util/FormattableFlags.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2004, 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
@ -33,7 +33,7 @@ package java.util;
*
* @since 1.5
*/
public class FormattableFlags {
public final class FormattableFlags {
// Explicit instantiation of this class is prohibited.
private FormattableFlags() {}

2
src/java.base/share/classes/java/util/concurrent/Executors.java
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@ -68,7 +68,7 @@ import jdk.internal.ref.CleanerFactory;
* @since 1.5
* @author Doug Lea
*/
public class Executors {
public final class Executors {
/**
* Creates a thread pool that reuses a fixed number of threads

2
src/java.base/share/classes/java/util/concurrent/locks/LockSupport.java
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@ -139,7 +139,7 @@ import jdk.internal.misc.Unsafe;
*
* @since 1.5
*/
public class LockSupport {
public final class LockSupport {
private LockSupport() {} // Cannot be instantiated.
private static void setBlocker(Thread t, Object arg) {