Sending special characters

I would like to send a String containing special characters "ä ö ü ß 😀"

Before doing anything complex, I tried

TelegramBot bot = new TelegramBot(System.getenv("TELEGRAM_BOT_TOKEN"));
SendResponse response = bot.execute(new SendMessage(1076643869, "ä ö ü ß 😀"));
System.out.println(response.message().text());

from which I receive a message containing ä ö ü ß 😀 and ä ö ü ß 😀 in the console.

I suspect that there is no fundamental error in my charset, since sending a HTTP POST request manually does not produce the error:

OutputStreamWriter writer = null;
BufferedReader reader = null;
try {
	URL url = new URL("https://api.telegram.org/bot" + System.getenv("TELEGRAM_BOT_TOKEN") + "/sendMessage");
	String payload = "{\"chat_id\": 1076643869, \"text\": \"ä ö ü ß 😀\"}";
	
	HttpURLConnection con = (HttpURLConnection) url.openConnection();
	con.setRequestMethod("POST");
	con.setDoInput(true);
	con.setDoOutput(true);
	con.setUseCaches(false);
	con.setRequestProperty("Content-Type", "application/json");
	con.setRequestProperty("Content-Length", String.valueOf(payload.length()));
	
	writer = new OutputStreamWriter(con.getOutputStream());
	writer.write(payload);
	writer.flush();
	
	reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
	
	StringBuilder builder = new StringBuilder();
	for (String line; (line = reader.readLine()) != null; ) {
		builder.append(line);
	}
	
} catch (IOException e) {
	e.printStackTrace();
} finally {
	try {
		if (writer != null)
			writer.close();
		if(reader != null)
			reader.close();
	}  catch (IOException e) {
		System.err.format("Cant close writer or reader: %s%n", e);
	}
}

sending a message containing ä ö ü ß 😀

Thanks to pengrad’s quick reply to my email, I could figure out that I am using the default windows charset;

System.out.println(System.getProperty("file.encoding")); // Prints windows-1252
System.out.println(Charset.defaultCharset().name()); // Prints windows-1252

A stated above, I don’t think that changing the charset via the VM options would fix the issue, although pengrad stated that it works fine for him (at least using “ä, ö, ü and ß”)

[torbeneims]

Unfortunately, I did not. To be honest, I have no clue what to do other than manually overwriting, thus changing the library used to execute the request…

[JVMBuilder]

Please add encoding UTF-8