how to save file on server folder

hi

i was trying to save file in my specify folder path.

but it cann't save on than location.

if i will not specify path then it directly save file on "c:program files\tomcat5.7\bin\mytextfile.txt"

if i will specify perfect path "c://systemfile//mytextfile.txt"

it saves on that location.

if i will define path as ".//www//systemfile//mytextfile.txt"

"//www//systemfile//mytextfile.txt"

"//systemfile//mytextfile.txt"

".//mytextfile.txt" it cann't save file on location

[531 byte] By [sandeep_2012a] at [2007-11-27 11:40:38]