How to convert an OutputStream into a string?

Question

This is my client code (J2ME):

SocketConnection sc = (SocketConnection) Connector.open("socket://localhost:4444");
sc.openOutputStream().write("test".getBytes());
sc.close();

And this is my server code (J2SE):

ServerSocket serverSocket = new ServerSocket(4444);
Socket clientSocket = serverSocket.accept();
OutputStream os = clientSocket.getOutputStream();

How would I go about creating a string representation of os?

Louis Wasserman · Accepted Answer · 2012-12-17 00:08:36Z

7

InputStream and OutputStream are for byte sequences. Reader and Writer are for character sequences, like Strings.

To turn an OutputStream into a Writer, do new OutputStreamWriter(outputStream), or much better, use new OutputStreamWriter(outputStream, Charset) to specify a Charset, which describes a way of converting between characters and bytes.

(The other direction, InputStreamReader, is similar.)

answered Dec 17, 2012 at 0:08

Louis Wasserman

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2 Comments

Lior Over a year ago

I'm not sure I understand. Do you mean I should create an OutputStreamWriter using the OutputStream I get from clientSocket? If so, what do I do with it? How to I get the content of the output stream?

Louis Wasserman Over a year ago

You don't "get contents of an output stream." You get contents of an input stream. That's...why it's called input. (In which case you'll probably want an InputStreamReader, not an OutputStreamWriter.)

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