String to File? Del. one line in a file?

[Roy Huang]

Hi,I have a xml file, which I want to add two lines and delete one line of it.
For the adding lines, I will use stringbuffer and append method to add it as a whole string, but how can I change it back to a temp File for transferring?
and How can I delete one line in my XML files?
it will be start with "<?"`end with "?>"
Thanks for any suggestins and help!!
Roy

[Maciej Kolodziej]

If You want to manipulate existing file content You can check java.io.RandomAccessFile.
But for manipulating xml file content You should user dom parser, which recreates xml as a tree and lets You change it and than write to a file.