39f90b7ce0
* java/io/PipedWriter.java (flush): Throw exception if stream closed. * java/io/OutputStreamWriter.java (write): Throw exception if stream closed. (writeChars): Don't throw exception if stream closed. * java/io/CharArrayWriter.java (closed): New field. (close): Set it. (flush): Throw exception if stream closed. (reset): Synchronize on correct lock. Allow stream to be reopened. (toCharArray, toString, writeTo): Synchronize. (write): Throwe exception if stream closed. * java/io/BufferedWriter.java (close): Clear `buffer'. (flush): Throw IOException if stream is closed. (write): Likewise. From-SVN: r39927