Ip address contain method fail check about ipaddress HOT 3 CLOSED

192.168.0.1/24 is the same address as 192.168.0.1. Therefore, 192.168.0.1 does not contain 192.168.0.2, 192.168.0.3, or 192.168.0.4. However, it does contain 192.168.0.1, since it is the same address.

If you want to check a subnet for containment, use the proper network address:

System.out.println(new IPAddressString("192.168.0.0/24").getAddress().
    contains(new IPAddressString("192.168.0.2").getAddress()));

or convert the address to the network address:

System.out.println(new IPAddressString("192.168.0.1/24").getAddress().toPrefixBlock().
    contains(new IPAddressString("192.168.0.2").getAddress()));

If you do that, you will be checking the subnet for containment.

This a duplicate of issue #60, issue #57, issue #54, issue #51, issue #45, issue #40, issue #30, issue #26, and also similar to issue #53 and issue #39.

This is explained in this wiki entry and this entry, see enclosingBlockContains in the latter.

from ipaddress.

Sorry then and thank you very much for the explanation.

from ipaddress.

No problem, good luck.

from ipaddress.