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.

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

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

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