"IP_A" and its prefix length of subnet mask is known , and there is a "IP_B" , I want to check whether "IP_A" is in the same netwoek segment with "IP_B", is there any jar JAVA has provided?
If there isn't any jar could finish the job.I have to finish by myself.
My way is like this. First make a binary notation according to the prefix length called "subnet" and then use the "subnet" to do AND operation with the "IP_A" ,then get the "network number" , do the same thing using "IP_B" and "subnet" and get another network number(network number2).
Finally compare the "network number" and the "network number2" to see whether they're the same.
If I merely know the prefix length of subnet mask , how can I get the subnet mask in binary or demical notation?
Thanks a lot!