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IP C-Class
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Doua Beri
Ranch Hand
Joined: Sep 24, 2009
Posts: 60
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Hi. I have 2 String vars ip1 and ip2 . How can I compare to see if they are from the same C-class or not. Thanks in advance
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Rob Spoor
Saloon Keeper
Joined: Oct 27, 2005
Posts: 18365
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Two ways (assuming IPv4):
- use substring matching. Cut off the last octet of both IP addresses and then check for equality
- convert to a byte[] using InetAddress, then compare the first three elements of the two arrays
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Doua Beri
Ranch Hand
Joined: Sep 24, 2009
Posts: 60
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OK. thanks
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Rob Spoor
Saloon Keeper
Joined: Oct 27, 2005
Posts: 18365
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You're welcome.
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subject: IP C-Class
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