Which capability exists only in java.io.FileWriter？（）<br>A:Closing an open stream.<br>B:Flushing an open stream.<br>C:Writing to an open stream.<br>D:Writing a line separator to an open stream.

Which capability exists only in java.io.FileWriter？（）
A:Closing an open stream.
B:Flushing an open stream.
C:Writing to an open stream.
D:Writing a line separator to an open stream.

出自：Oracle认证

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