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Answer

Posted by Gokulraj on November 20, 2000 at 4:59 AM

> Does anyone know why a NullPointerException might be thrown. I am trying to copy the details from an array into a text file using the following code;

> try
> {FileWriter fw = new FileWriter "C:\\Java_Files\\Customers_Java.txt");
> PrintWriter pw = new PrintWriter(fw);
>
> for (i = 1; i <= customers_held; i++)
> {
> pw.println(i);
> pw.println(name[i]);
> pw.println(street[i]);
> pw.println(town[i]);
> pw.println(county[i]);
> pw.println(postcode[i]);
> }
> fw.close();
> }catch(FileNotFoundException e){
> System.out.println("Error: Can't find file specified!");
> }catch(IOException e){
> System.out.println("I/O Error: " + e);
> }

> Any help would be appreciated!
> Many thanks

I think the Error was there in FileWriter instantiation...u missed a left parenthesis...Null Pointer Exception will occur whenever u missed to instantiate the object..

check whether u declared the variable customers_held...and check every variable

bye
Gokulraj