java - Writer or OutputStream? -

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i'm designing library class should have ability able convert internals text. class shall use: outputstream or writer? , key difference between them (in case)?

public interface memento {   void save(outputstream stream);   void save(writer writer); }

which one?

an outputstream byte-oriented stream. text write has encoded bytes using encoding (most commonly iso-8859-1 or utf-8). writer character-oriented stream may or may not internally encode characters bytes, depending on writing to.

edit if designing library, if provide outputstream-oriented interface text written, should provide client classes ability control encoding used.


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