How do you "empty" a StringWriter in Java?

What is the correct way to "empty" a StringWriter in Java so that I can reuse the StringWriter without having 开发者_StackOverflowto create a new one? Neither StringWriter.flush() nor StringWriter.close() seem to have the desired effect.

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How about calling getBuffer().setLength(0)?

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Alternatively, we could also delete the buffer using the following code:

StringBuffer buf = ****.getBuffer();
buf.delete(0,buf.length());