RFR: 4799358: BufferOutputStream.write() should immediately throw IOExcept on closed stream

[Chen Liang]

On Mon, 21 Aug 2023 14:26:39 GMT, Vyom Tewari <vtewari at openjdk.org> wrote:

> With the current  implementation of BufferedOutputStream if you close the stream and try to write to the closed stream BufferedOutputStream does not throw an IOException until the internal buffer is full. To fix this issue i added a private  "ensureOpen" function to BufferedOutputStream which will check if the underline stream is open. If the underline stream is closed "ensureOpen" will throw the IOException.

`write(int)` should have an `ensureOpen` check too.

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PR Comment: https://git.openjdk.org/jdk/pull/15361#issuecomment-1686499580