Package org.apache.commons.net.util

Class SubnetUtils

  • public class SubnetUtils
extends java.lang.Object
    A class that performs some subnet calculations given a network address and a subnet mask.
    Since:
    2.0
    See Also:
    "http://www.faqs.org/rfcs/rfc1519.html"

    • Constructor Detail

      • SubnetUtils

        public SubnetUtils​(java.lang.String cidrNotation)
        Constructor that takes a CIDR-notation string, e.g. "192.168.0.1/16"
        Parameters:
        cidrNotation - A CIDR-notation string, e.g. "192.168.0.1/16"
        Throws:
        java.lang.IllegalArgumentException - if the parameter is invalid, i.e. does not match n.n.n.n/m where n=1-3 decimal digits, m = 1-3 decimal digits in range 1-32

      • SubnetUtils

        public SubnetUtils​(java.lang.String address,
                   java.lang.String mask)
        Constructor that takes a dotted decimal address and a dotted decimal mask.
        Parameters:
        address - An IP address, e.g. "192.168.0.1"
        mask - A dotted decimal netmask e.g. "255.255.0.0"
        Throws:
        java.lang.IllegalArgumentException - if the address or mask is invalid, i.e. does not match n.n.n.n where n=1-3 decimal digits and the mask is not all zeros

    • Method Detail

      • isInclusiveHostCount

        public boolean isInclusiveHostCount()
        Returns true if the return value of SubnetUtils.SubnetInfo.getAddressCount() includes the network and broadcast addresses.
        Returns:
        true if the hostcount includes the network and broadcast addresses
        Since:
        2.2

      • setInclusiveHostCount

        public void setInclusiveHostCount​(boolean inclusiveHostCount)
        Set to true if you want the return value of SubnetUtils.SubnetInfo.getAddressCount() to include the network and broadcast addresses.
        Parameters:
        inclusiveHostCount - true if network and broadcast addresses are to be included
        Since:
        2.2