Converting String to Double Problem

[Asad]

Hi,

I have retrieved values in a file. Used

Double dval;
String line;
try{

BufferedReader in=new BufferedReader(new FileReader("File1.txt"));
line = in.readLine();
dval=Double.parseDouble(line);
System.out.println(dval);
}
catch(IOException e){}
catch(NumberFormatException e){}

.
.
.
.


Well, I am not getting any errors, Yet dval is not being printed. Please Help me!!

[Prasanth Nair]

looks like your application is not reading the file.Try giving some SOP in the catch block & give a printstack tace there. You might be able to see the error.

[stevehnsn]

For situations such as this you have to make good use of debugging. This means printing various values out to the console to check their validity. You should definitely be using some sort of logging or printing to standard output in all of your error handling from now on. The sooner you can start implementing proper coding practices, the better you will be in the long run.

Good luck!

Steve Hanson
Tasen Software
New Hampshire (NH) Website Design and Software Development

[r035198x]

Hi,

I have retrieved values in a file. Used

Double dval;
String line;
try{

BufferedReader in=new BufferedReader(new FileReader("File1.txt"));
line = in.readLine();
dval=Double.parseDouble(line);
System.out.println(dval);
}
catch(IOException e){}
catch(NumberFormatException e){}

.
.
.
.


Well, I am not getting any errors, Yet dval is not being printed. Please Help me!!

That is not exception handling. That is exception hiding.

[Asad]

That is not exception handling. That is exception hiding.

Well, Could you please tell me whats wrong with my program. I do have the file and its reading from the file too, yet I am unable to convert it to double or any other format using parse, like Integer.parseInt(line); or Double.parseDouble(line);
please help.

[r035198x]

Well, Could you please tell me whats wrong with my program. I do have the file and its reading from the file too, yet I am unable to convert it to double or any other format using parse, like Integer.parseInt(line); or Double.parseDouble(line);
please help.

change
catch(IOException e){}
catch(NumberFormatException e){}
to

catch(IOException e){
 e.printStackTrace();
}
catch(NumberFormatException e){
 e.printStackTrace();
}

compile and run and see what happens