java file handling

java file handling

Hi friends, My situation is i have file named "sample.conf" which contains more IP Adressess.Eg: the file contains "IP=255.255.255.255" at some lines in the file. what i need to do is. i need to search for the particular occurance of the "IP=255.255.255.255" and exactly change the ip address which user enter. say if teh IP in teh file is IP=172.10.9.134" and user enters "172.10.8.123" means the IP should be updated as "IP=172.10.8.123"

guys please help., give some codes for this situation.

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