Java to seek host IP address and its corresponding subnet mask

Not much to say, directly on the code.

Package com.ckw.test; 
Import Java.io.BufferedReader; 
Import java.io.IOException;
Import Java.io.InputStreamReader;
Import java.util.*;

Import Java.util.Map.Entry;
	 public class Testofsubnetmask {map<string, string> Map = new hashmap<string, string> ();
	 String IPAddress;
	 String SubnetMask; 				Boolean flag = false; Used to mark a pair of IP addresses with a subnet mask (a pair of adjacent positions)//Get the subnet mask of the corresponding IP address public void Getipaddressandmask () {String OS = System.getprope  
		 Rty ("Os.name"); 
				 if (OS!= null && os.startswith ("Windows")) {try {String command = "cmd.exe/c Ipconfig/all";   
				 Process p = runtime.getruntime (). exec (command);   
				 BufferedReader br = new BufferedReader (New InputStreamReader (P.getinputstream (), "gb2312"));     
				 String Line;
				 System.out.println ("---------------------------------------------------------------");            while (line = Br.readline ())!= null) {System.out.println (line); This sentence can be omitted, mainly in order to print out all the information to facilitate the comparison
					 * * Obtain the Machine IP address * In the first line of "IPV4" to obtain the IP address, the English version is "IP addresses" at the beginning of the * format: * IPV4 address ... . . . . . . : 10.10.116.132 (preferred)//See doc under the command output/if (Line.indexof ("IPV4 address") > 0 | | line.indexof ("IP addresses") ;  
						 0) {int index = Line.indexof (":");    
						 Index + 2;  
						 
						 IPAddress = line.substring (index);
						 Remove the Chinese character "10.10.116.132 (preferred)" int i;
						 char [] array = Ipaddress.tochararray (); For (i=0 i<array.length; i++) {if array[i]!= '. ' && (array[i]< ' 0 ' | |
						 Array[i]> ' 9]) break;
						 
						 } ipaddress = ipaddress.substring (0, I); 			 Flag = true; There is an IP address that must have its corresponding subnet mask}/* Get the machine subnet mask * In the line beginning with subnet mask, get the subnet mask, the English version is "Subnet Mask The opening * format is: * Subnet mask ...: 255.255.255.192 */if (flag==true && (line) . IndexOf ("subnet mask") > 0 | | Line.indexof ("Subnet Mask") >0) {int index = Line.indexof (":");      
						 Index + 2;     
						 SubnetMask = line.substring (index);  Flag = false;
					 Consume Map.put (ipaddress, SubnetMask);    
				 } br.close ();
			 System.out.println ("---------------------------------------------------------------");	 
			 catch (IOException e) {e.printstacktrace (); }}//main function test public static void main (String args[]) {testofsubnetmask test = new Testofsubnetm
		 Ask ();
		 
		 Test.getipaddressandmask ();
		 map<string, string> map = Test.map;
		 iterator<entry<string, string>> i = Map.entryset (). iterator ();
			 while (I.hasnext ()) {entry<string, string> e = I.next ();
			 String ipaddress = E.getkey ();
			 String SubnetMask = E.getvalue ();
			 System.out.println ("IP Address:" + ipaddress);
		 SYSTEM.OUT.PRINTLN ("Subnet mask:" + SubnetMask);  
     
 }
	 } 
}

The results are:

---------------------------------------------------------------Windows IP Configuration host name ............. : DADI primary DNS suffix ........... : node type ............: mixed IP routing enabled ..........: no WINS agent enabled ... . : No Wireless LAN Adapter wireless network connection 29: Connect a specific DNS suffix ...: description ............... : Microsoft Virtual WiFi Miniport Adapter #26 Physical address ............. : 22-16-d8-c9-a3-b2 DHCP is enabled ........... : No automatic configuration Enabled ..........: is a local link IPv6 address ... : fe80::89eb:f7f1:e6b7:6133%74 (preferred) IPV4 address ............:172.17.31.1(preferred) Subnet mask ............ : 255.255.0.0 Default gateway ............. : DHCPv6 Iaid ........... : 1512183512 DHCPv6 Client DUID ...: 00-01-00-01-19-03-ef-d5-08-60-6e-dc-a7-b7 the DNS server .....
                           ...: fec0:0:0:ffff::1%1 fec0:0:0:ffff::2%1            NetBIOS on fec0:0:0:ffff::3%1 TCPIP ...: Wireless LAN adapter wireless network connection enabled: Media status ........... . : The media has disconnected the specific DNS suffix ...: description ............... : Qualcomm atheros AR9485 Wireless network Adapter Physical Address ............. : 20-16-d8-c9-a3-b2 DHCP is enabled ........... : Is automatic configuration enabled ..........: is Ethernet adapter Local Area Connection: Connection specific DNS suffix ...: description ............... : Realtek PCIe GBE Family Controller Physical Address ............. : 08-60-6e-dc-a7-b7 DHCP is enabled ........... : Is automatic configuration enabled ..........: is a local link IPv6 address ...  : fe80::c0c9:c8b6:4003:7976%12 (preferred) IPV4 address ............:10.10.116.132(preferred) Subnet mask ........... . : 255.255.255.192 time to obtain a lease ... . : July 18, 2015 23:01:04 Lease expiration Time ... . : July 25, 2015 23:01:02 default gateway ............. : 10.10.116.129 DHCP Server ...........
  : 222.200.98.70 DHCPV6 Iaid ........... : 252207214 DHCPv6 Client DUID ...: 00-01-00-01-19-03-ef-d5-08-60-6e-dc-a7-b7 DNS server ........ .  : 202.96.128.86 202.116.128.1 TCPIP NetBIOS ...: Tunnel adapter local Connection enabled * 37: Connect a specific DNS suffix ...: description ............... : Teredo Tunneling Pseudo-Interface Physical Address ............. : 00-00-00-00-00-00-00-e0 DHCP is enabled ...........  : No automatic configuration enabled ..........: is IPV6 address ............:2001:0:9d38:6ab8:aa:e4df:48c0:88c7(preferred) Local link IPv6 address ..... : fe80::aa:e4df:48c0:88c7%66 (preferred) Default gateway ............. ::: NetBIOS on TCPIP ...: Disabled tunnel Adapter 6to4 Adapter: Media status ............: media disconnected specific DNS Suffix ...: description ............... : Microsoft 6to4 Adapter Physical Address ............. : 00-00-00-00-00-00-00-e0 DHCP is enabled ........... : no sinceDynamic configuration enabled ..........: is a tunnel adapter reusable Microsoft 6to4 Adapter: Media status ............: media disconnected specific D NS suffix ...: description ............... : Microsoft 6to4 Adapter #2 Physical Address ............. : 00-00-00-00-00-00-00-e0 DHCP is enabled ........... : No automatic configuration enabled ..........: is a tunnel adapter Local Area Connection * 17: Media status ............: media disconnected specific DNS suffix .... ..: Description ............... : Microsoft 6to4 Adapter #3 Physical Address ............. : 00-00-00-00-00-00-00-e0 DHCP is enabled ...........
: No automatic configuration enabled ..........: is//partially omitted ... ---------------------------------------------------------------

That's the main output.
IP  Address: 10.10.116.132
subnet Mask: 255.255.255.192
IP  address: 172.17.31.1
Subnet Mask: 255.255.0.0

Below is a comparison of ipconfig results under doc