Handling integers in files

Question

Hi!!
In the code below I try to read a number and a String
to a file. But the number can't be extracted when
reading from the file again!
Why can that be?...;/
kR\\j*
import java.io.* ;
import java.util.* ;
public class TestaNu
     public static void main(String[] args)
          try
               File minFil = new File("sol.txt") ;
               FileWriter writer = new FileWriter(minFil) ;
               writer.write(1974) ;
               writer.write("Testing") ;
               writer.close() ;
               File minAndra = new File("min.txt") ;
               FileReader reader = new FileReader(minFil) ;
               FileWriter wri = new FileWriter(minAndra) ;
               wri.write(reader.read()) ;
               wri.write(reader.read()) ;
               wri.close() ;
               reader.close() ;
               Scanner sc = new Scanner(minAndra) ;
          catch (IOException ie)
               ie.printStackTrace() ;
}

Answer 1

You need to read the API:
http://java.sun.com/j2se/1.5.0/docs/api/java/io/Writer.html#write(int)
http://java.sun.com/j2se/1.5.0/docs/api/java/io/Reader.html#read()
               writer.write(1974) ;This statement doesn't write the four characters '1', '9', '7', '4' to the file.
It writes the single character \u07b6 (that's 1974 in hex) to the file.
I have no idea what character that is!
               reader.read() ;This expression reads the next character. One character! You seem to
be using it as a generic "read the next thing -- integer, string etc..."
I think what you should do is to sit down and come up with a file format,
especially if you will be mixing numbers and text, then realize that
reading from such a file will be an exercise in parsing.