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Asked: 2026-06-16T23:32:35+00:00

I’m interested in writing arrays of bytes to disk using BufferedWriter.write() . But that

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I’m interested in writing arrays of bytes to disk using BufferedWriter.write(). But that method wants an array of characters. I’ll have to convert the byte[] to char[]. Easy right? Well my first try in Clojure failed to convert the bytes to chars. Thus I started wondering why the BufferedWriter.write() method is so picky about wanting char[].
Note: OuputStream has a write method which takes byte[]. So my question is about the framework design choice for wanting char[] in BufferedWrite.write().

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1 Answer

  1. Editorial Team

    BufferedWriter is a kind of Writer, and Writer is meant for writing characters. To output raw bytes, you want to use some type of OutputStream — in this case, a BufferedOutputStream.

    (The bridge between OutputStream and Writer is the OutputStreamWriter class. It’s a Writer that takes characters, encodes them into bytes using a scheme such as UTF-8, and feeds the resulting bytes to an OutputStream.)

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