import java.io.*; 

  class FileReadTest { 

     public static void main (String[] args) { 
	FileReadTest f = new FileReadTest();
        f.readMyFile(); 
     } 

     void readMyFile() { 

        DataInputStream dis = null; 
        String record = null; 
        int recCount = 0; 

        try { 

           File f = new File("mydata.txt"); 
           FileInputStream fis = new FileInputStream(f); 
           BufferedInputStream bis = new BufferedInputStream(fis); 
           dis = new DataInputStream(bis);  

           while ( (record=dis.readLine()) != null ) { 
              recCount++; 
              System.out.println(recCount + ": " + record); 
           } 

        } catch (IOException e) { 
           // catch io errors from FileInputStream or readLine() 
           System.out.println("Uh oh, got an IOException error!" + e.getMessage()); 

        } finally { 
           // if the file opened okay, make sure we close it 
           if (dis != null) { 
	      try {
                 dis.close(); 
	      } catch (IOException ioe) {
	      }
           } 
        } 
     } 
}