RFR: 8361018: Re-examine buffering and encoding conversion in BufferedWriter [v5]

[Shaojin Wen]

On Tue, 1 Jul 2025 02:07:07 GMT, Brett Okken <duke at openjdk.org> wrote:

> > StreamEncoder has a ByteBuffer that acts as a buffer,
> 
> At a fixed sized of 512 bytes which cannot be affected by size passed into the BufferedWriter?

So I added this method StreamEncoder::growByteBufferIfEmptyNeeded and called it in the BufferedWriter constructor


    private BufferedWriter(Writer out, int initialSize, int maxSize) {
        // ...
        if (out instanceof OutputStreamWriter w && w.se.getCharset() == UTF_8.INSTANCE) {
            w.se.growByteBufferIfEmptyNeeded(initialSize);
            this.impl = new OutputStreamWriterImpl(w);
        }
        // ...
    }

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PR Comment: https://git.openjdk.org/jdk/pull/26022#issuecomment-3021479496