How to make the PrintWriter to write UTF-8?

Question

How to make the PrintWriter to write UTF-8?

pstream = new PrintWriter(csocket.getOutputStream(), true);
String res = "some string";
pstream.println(res); // here I want to output string as UTF-8

score 63 · Answer 1 · edited Jan 13 '14 at 17:15

63

Use an OutputStreamWriter:

pstream = new PrintWriter(new OutputStreamWriter(
    csocket.getOutputStream(), StandardCharsets.UTF_8), true)

edited Jan 13 '14 at 17:15

Andrew Thompson

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answered Jan 13 '14 at 16:33

Njol

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1

Note: `OutputStreamWriter` documentation recommends to use a wrapping within a BufferedWriter for efficiency – Viktor Mukhachev Mar 30 '20 at 11:22

score 7 · Answer 2 · answered Jan 12 '20 at 18:25

7

OutputStream os = new FileOutputStream("file.txt");
PrintWriter pw = new PrintWriter(new OutputStreamWriter(os, "UTF-8"));

answered Jan 12 '20 at 18:25

Krzysztof

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score 3 · Answer 3 · edited May 23 '17 at 12:17

3

Look at Java: Difference between PrintStream and PrintWriter discussion.

To be quick: you can use -Dfile.encoding=utf8 JVM parameter or method suggested in the discussion (see second answer).

edited May 23 '17 at 12:17

Community

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answered Jan 13 '14 at 16:37

Daniil

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The JVM `file.encoding` saved me from a problem I've been having for years. Thanks @Daniil! – thoni56 Nov 03 '18 at 17:37

score 1 · Answer 4 · edited Aug 13 '16 at 12:40

1

PrintWriter out1 = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    out1 = new PrintWriter(new OutputStreamWriter(socket.getOutputStream(), StandardCharsets.UTF_8),true);
} else { 
    out1 = new PrintWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8"), true);
}

edited Aug 13 '16 at 12:40

Tunaki

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answered Aug 13 '16 at 12:32

Shahab Saalami

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question has nothing to do with android. – Stealth Rabbi Feb 13 '17 at 20:03

score 1 · Answer 5 · edited Oct 08 '16 at 15:52

1

Don't user PrintWriter. If you need UTF-8 encoding, just write direct to the OutputStream.

csocket.getOutputStream().write(res.getBytes("UTF-8"));

edited Oct 08 '16 at 15:52

Dakkaron

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answered Oct 02 '16 at 09:49

dave110022

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While that is possible, that does not provide one with a `Writer` what OP is likely looking for. – Oliver Gondža Jan 23 '19 at 11:49
1

There are cases where `java.io.PrintWriter` cannot be avoided, such as when subclassing `javax.servlet.http.HttpServletResponseWrapper`. – Parker Sep 22 '20 at 16:09
I agree with writing direct to an OutputStream that way you actually know exactly what's going on. Using wrappers in a great class hierarchy usually takes for ever to get them to work - simplicity is better. – dave110022 Nov 07 '21 at 09:09

score 0 · Answer 6 · answered Jul 12 '16 at 20:24

0

you can only write to file with any charset, otherwise platform default charset used see doc

answered Jul 12 '16 at 20:24

Error

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How to make the PrintWriter to write UTF-8?

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