Compilation Errror in File program

Question

Hi,
When I Compile this program in command prompt I got this error:
Note: AA.java uses or overrides a deprecated API.
Note: Recompile with -deprecation for details.
Pgm:
import java.io.*;
public class AA
     public static void main(String[] args)
     try
     File f = new File("first.txt");
     FileInputStream fis = new FileInputStream(f);
     BufferedInputStream bis = new BufferedInputStream(fis);
     DataInputStream dis = new DataInputStream(bis);
     String record = null;
     while ( (record=dis.readLine()) != null )
     System.out.println(record);
     catch(IOException e)
          System.out.println("Unable to open the file");
Thanks

Answer 1

If you check the API for java.io.DataInputStream, you would have found out that the readLine() method has been deprecated.
    Deprecated. This method does not properly convert bytes to characters.
As of JDK 1.1, the preferred way to read lines of text is via the
BufferedReader.readLine() method. Programs that use the DataInputStream
class to read lines can be converted to use the BufferedReader class by
replacing code of the form:
             DataInputStream d = new DataInputStream(in);
    with:
             BufferedReader d
                  = new BufferedReader(new InputStreamReader(in));        
    See the general contract of the readLine method of DataInput.
    Bytes for this operation are read from the contained input stream. The API is your friend...
JJ