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8247918: Clarify Reader.skip behavior for end of stream

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Reviewed-by: rriggs, naoto
This commit is contained in:
Brian Burkhalter 2021-02-19 17:21:11 +00:00
parent 8a1c712c2e
commit 7ffa1481c2
8 changed files with 108 additions and 69 deletions
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13
src/java.base/share/classes/java/io/CharArrayReader.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1996, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1996, 2021, 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
@ -146,16 +146,19 @@ public class CharArrayReader extends Reader {
}
/**
* Skips characters. Returns the number of characters that were skipped.
* Skips characters. If the stream is already at its end before this method
* is invoked, then no characters are skipped and zero is returned.
*
* <p>The {@code n} parameter may be negative, even though the
* {@code skip} method of the {@link Reader} superclass throws
* an exception in this case. If {@code n} is negative, then
* this method does nothing and returns {@code 0}.
*
* @param n The number of characters to skip
* @return The number of characters actually skipped
* @throws IOException If the stream is closed, or an I/O error occurs
* @param n {@inheritDoc}
*
* @return {@inheritDoc}
*
* @throws IOException {@inheritDoc}
*/
public long skip(long n) throws IOException {
synchronized (lock) {