Prepend 2 lines to an existing shell script using java

Hi:
I have a shell script such as
#!/bin/sh
#author ...
#goal ...
set CMDARGS = ...
Now, I need to add 2 lines to this file before the set command so that the script looks like
#!/bin/sh
#author ...
#goal ...
Line 1
Line 2
set CMDARGS = ...
Essentially, Line 1 will be the first line of the script after the comments. How can I do this using File IO in java 1.5?
Thanks.

There no special I/O methods to insert lines into the middle of a file.
I would do the obvious:
1. Read from a BufferedReader
2. Open a temporary file and write to a BufferedWriter,
inserting the new lines where they should go.
3. Delete the original file and rename the new one to take its place.

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Prepend 2 lines to an existing shell script using java

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