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Thread: Reading input from console (greek chars)

  1. #1
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    Default Reading input from console (greek chars)

    Hello There

    The following example code works fine.

     public static void main(String[] args) {
                   [B] char a='α';[/B]
                    System.out.println(a);
                    System.out.println((int)a);
                }


    Output
    α
    945


    This means, i think, that greek chars can be handled. 'α' is displayed.

    But the problem arises when i try to read greek chars from input


    public static void main(String[] args) {
            try {
                BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
                String str = "";
                while (!str.equals("exit")) {
                    str = in.readLine();                   //input is greek 'α'
     
                   char[] charArr;
                    charArr=str.toCharArray();
     
                    for(int i=0;i<str.length();i++){
                        System.out.println(charArr[i]);    //outputs '?' not expected 'α'
                        System.out.print((int)charArr[i]);  //and this outputs '63' as for all other greek chars!
                    }
     
                }
                System.exit(0);
            } catch (IOException e) {
     
            }
        }

    Output

    ?
    63

    Any ideas why the greek char isn't stored correctly in the array in the first place?
    Last edited by lemmyz; August 15th, 2010 at 07:36 PM. Reason: highlighted code


  2. #2
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    Default Re: Reading input from console (greek chars)

    Look at the constructors for the InputStreamReader. One of them takes a charset arg.
    Perhaps your default charset doesn't support greek chars

  3. #3
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    Default Re: Reading input from console (greek chars)

    I added "UTF8" and then "Cp1253" (for greek only) but still the same.


     BufferedReader in = new BufferedReader(new InputStreamReader(System.in, "Cp1253" ));

  4. #4
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    Default Re: Reading input from console (greek chars)

    I can't test without some greek letters.
    Can you make a test file and attach it to your post?

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    Default Re: Reading input from console (greek chars)

    thanks for your help but won't you have to type greek? By the way i checked the declaration of InputStreamReader.java
    and netbeans shows several "mistakes". How can that be? it's the JDK!!!


  6. #6
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    Default Re: Reading input from console (greek chars)

    Sorry, I don't use your IDE and don't know what the red lines mean. Are there error messages anywhere?

  7. #7
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    Default Re: Reading input from console (greek chars)

    Yep:

    1. cannot find symbol
    symbol: class StreamDecoder
    location: class java.io.InputStreamReader


    2. variable sd might not have been initialized

    3. exception java.io.UnsupportedEncodingException is never thrown in body of corresponding try statement

    on top of the file says:
    package sun.nio.cs does not exist


    i'm starting to think that there's something there....

    i use jdk1.6.0_21

  8. #8
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    Default Re: Reading input from console (greek chars)

    I don't think you supposed to be able to compile Sun's source.

  9. #9
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    Default Re: Reading input from console (greek chars)

    Well i know that but all these errors? i do not intend to complile Sun's source. I was just checking if all my imports work...

  10. #10
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    Default Re: Reading input from console (greek chars)

    I don't know if the code you are looking at generates what is in the rt.jar file.

  11. #11
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    Default Re: Reading input from console (greek chars)

    Well it appears to be a lot harder than i thought.. thanks anyway for your hints

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