Reading input from console (greek chars)

**lemmyz** · August 15th, 2010, 06:23 PM

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?

**Norm** · August 15th, 2010, 06:32 PM

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

**lemmyz** · August 15th, 2010, 06:48 PM

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

 BufferedReader in = new BufferedReader(new InputStreamReader(System.in, "UTF8" ));

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

**Norm** · August 15th, 2010, 07:35 PM

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

**lemmyz** · August 15th, 2010, 07:43 PM

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!!!

**Norm** · August 15th, 2010, 07:47 PM

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

**lemmyz** · August 15th, 2010, 07:53 PM

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

**Norm** · August 15th, 2010, 08:04 PM

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

**lemmyz** · August 15th, 2010, 08:06 PM

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...

**Norm** · August 15th, 2010, 08:09 PM

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

**lemmyz** · August 16th, 2010, 05:37 AM

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

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