If I just call close() in a output stream, the output is guaranteed, or need I call flush() always?
If I just call close() in a output stream, the output is guaranteed, or
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If I just call close() in a output stream, the output is guaranteed, or need I call flush() always?
Close() always flushes so no need to call.
EDIT: This answer is based on common sense and all the outputstream I encountered. Who is going to implement a close() for a buffered stream without flushing buffer first? There is no harm to call flush right before close(). However, there are consequences if flush() is called excessively. It may defeat underneath buffering mechanism.