Java charset - 如何从System.in获得正确的输入？

Question

my first post here. Well, i'm building a simple app for messaging through console(cmd and terminal), just for learning, but i'm got a problem while reader and writing the text with a charset.

Here is my initial code for sending message, the Main.CHARSET was setted to UTF-8:

Scanner teclado = new Scanner(System.in,Main.CHARSET);
BufferedWriter saida = new BufferedWriter(new OutputStreamWriter(new BufferedOutputStream(cliente.getOutputStream()),Main.CHARSET)));
saida.write(nick + " conectado!");
saida.flush();
while (teclado.hasNextLine()) {
    saida.write(nick +": "+ s);
    saida.flush();
}

And the receiving code:

try (BufferedReader br = new BufferedReader(new InputStreamReader(servidor,Main.CHARSET))){
    String s;
    while ((s = br.readLine()) != null) {
        System.out.println(s);
    }
}

When i send "olá" or anything like "ÁàçÇõÉ" (Brazilian portuguese), i got just blank spaces on windows cmd (not tested in linux).

So i teste the following code:

Scanner s = new Scanner(System.in,Main.CHARSET);
System.out.println(s.nextLine());

And for input "olá", printed "ol ".

the question is, how to read the console so that the input is read correctly , and can be transmitted to another user and be displayed correctly to him.

Answer 1

if you just wanna output portuguese in text file, it would be easy.

The only thing you have to care about is display by UTF-8 encoding.

you can use a really simple way like

    String text = "olá";
    FileWriter fw = new FileWriter("hello.txt");
    fw.write(text);
    fw.close();

Then open hello.txt by notepad or any text tool that support UTF-8

or you have to change your tool's default font into UTF-8.

---

If you want show it on console, I think pvg already answer you.

---

OK, seems you still get confuse on it.

here is a simple code you can try.

        Scanner userInput = new Scanner(System.in);//type olá plz
        String text = userInput.next();
        System.out.println((int)text.charAt(2));//you will see output int is 63        

        char word = 'á'; // this word covert to int is 225
        int a = 225;
        System.out.println((int)word);// output 225
        System.out.println((char)a);  // output  á

So, what is the conclusion?

If you use console to tpye in portuguese then catch it, you totally get different word, not a gibberish word.