com.fr.ftp.util

类 SubnetUtils

java.lang.Object

com.fr.ftp.util.SubnetUtils

public class SubnetUtils
extends java.lang.Object

A class that performs some subnet calculations given a network address and a subnet mask.

从以下版本开始:

2.0

另请参阅:

"http://www.faqs.org/rfcs/rfc1519.html"

嵌套类概要

嵌套类

限定符和类型	类和说明
class	SubnetUtils.SubnetInfo Convenience container for subnet summary information.

构造器概要

构造器

构造器和说明
SubnetUtils(java.lang.String cidrNotation) Constructor that takes a CIDR-notation string, e.g. "192.168.0.1/16"
SubnetUtils(java.lang.String address, java.lang.String mask) Constructor that takes a dotted decimal address and a dotted decimal mask.

方法概要

方法

限定符和类型	方法和说明
SubnetUtils.SubnetInfo	getInfo() Return a SubnetUtils.SubnetInfo instance that contains subnet-specific statistics
boolean	isInclusiveHostCount() Returns true if the return value of SubnetUtils.SubnetInfo.getAddressCount() includes the network and broadcast addresses.
void	setInclusiveHostCount(boolean inclusiveHostCount) Set to true if you want the return value of SubnetUtils.SubnetInfo.getAddressCount() to include the network and broadcast addresses.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

SubnetUtils

public SubnetUtils(java.lang.String cidrNotation)

Constructor that takes a CIDR-notation string, e.g. "192.168.0.1/16"

参数:

cidrNotation - A CIDR-notation string, e.g. "192.168.0.1/16"

抛出:

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.

参数:

address - An IP address, e.g. "192.168.0.1"

mask - A dotted decimal netmask e.g. "255.255.0.0"

抛出:

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

方法详细资料

isInclusiveHostCount

public boolean isInclusiveHostCount()

Returns true if the return value of SubnetUtils.SubnetInfo.getAddressCount() includes the network and broadcast addresses.

返回:

true if the hostcount includes the network and broadcast addresses

从以下版本开始:

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.

参数:

inclusiveHostCount - true if network and broadcast addresses are to be included

从以下版本开始:

2.2

getInfo

public final SubnetUtils.SubnetInfo getInfo()

Return a SubnetUtils.SubnetInfo instance that contains subnet-specific statistics

返回:

new instance