flush() API中文翻译
public synchronized void flush() throws IOException
* Flushes this buffered output stream. This forces any buffered
冲洗这个缓存的输出流 该方法会促使任何缓存的
* output bytes to be written out to the underlying output stream.
* 的输出字节会被写出到底层的输出流
* @exception IOException if an I/O error occurs.
* @see java.io.FilterOutputStream#out
*/
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