Java:How can i get the encoding from inputStream?

Question

I want get the encoding from a stream.

1st method - to use the InputStreamReader.

But it always return OS encode.

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Answer 1

Let's resume the situation:

• InputStream delivers bytes
• *Readers deliver chars in some encoding
• new InputStreamReader(inputStream) uses the operating system encoding
• new InputStreamReader(inputStream, "UTF-8") uses the given encoding (here UTF-8)

So one needs to know the encoding before reading. You did everything right using first a charset detecting class.

Reading http://code.google.com/p/juniversalchardet/ it should handle UTF-8 and UTF-16. You might use the editor JEdit to verify the encoding, and see whether there is some problem.