8283480: Make AbstractStringBuilder sealed
Reviewed-by: jjg, rriggs, jlaskey, dfuchs
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -56,7 +56,8 @@ import static java.lang.String.checkOffset;
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* @author Ulf Zibis
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* @since 1.5
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*/
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abstract class AbstractStringBuilder implements Appendable, CharSequence {
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abstract sealed class AbstractStringBuilder implements Appendable, CharSequence
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permits StringBuilder, StringBuffer {
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/**
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* The value is used for character storage.
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*/
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