GetResourceAsStream(String name) - how to use it?

Question

I tryed to read from a "res.txt" file some text data. This is a test app:
public class ResTest extends MIDlet{
     public void startApp(){
          try{
               InputStream is=new String().getClass().getResourceAsStream("/res.txt");
               DataInputStream dis=new DataInputStream(is);
               System.out.println(dis.readUTF());
          }catch(Exception e){System.out.println(e);}     
     public void destroyApp(boolean bool){}
     public void pauseApp(){}
All I got was EOFException.
So I tryed a different way to read data usinf a loop:
               char ch;
               while((ch=dis.readChar())!=-1){
               System.out.print(ch);
And than I got:
??????java.io.EOFException
The data in "res.txt" file (I put this file to "res" direction of my project, I use KToolbar):
Jajko
Banan

Answer 1

I'm guessing that the res.txt file is a basic ASCII file, right?
If this is the case then that is your problem. When you used readUTF() the implementation was expecting a string in UTF format and not basic ASCII so it didn't know how to read it.
And when you used the readChar() method you have to remember that Java is a Unicode language so chars are 2 bytes. If the string has an odd number of characters then the last character won't have the 2 bytes and you will get an EOFException. And even if the number of chars was even, you wouldn't get the exception but the text wouldn't be what you expect since it was reading text encoded in single byte ASCII format.
You have two choices:
a) Encode the res.txt file appropiately, either save as as a UTF-8 file and use readUTF(), or a Unicode file and use the readChar() method.
b) Use readByte() instead of readChar() and save the bytes in an array, then pass that array to a string constructor.
shmoove