Java gets the native name, IP, MAC address, and network card name

Java gets the native name, IP, MAC address, and network card name

Excerpt: 80364370

May 18, 2018 14:53:19Hits: 134

   
  
 
   

   
import java.net.InetAddress;
 
   

   
import java.net.NetworkInterface;
 
   

   
 
   

   
 Public  class IpConfig  {
 
   

   
@SuppressWarnings ("static-access")
 
   

   
Public   static void main(string[] args) throws Exception {
 
   

   
InetAddress IA = null;
 
   

   
Try {
 
   

   
ia = Ia.getlocalhost ();
 
   

   
String localname = Ia.gethostname ();
 
   

   
String Localip = ia.gethostaddress ();
 
   

   
System.out.println ("The Machine name is:" + localname);
 
   

   
System.out.println ("The IP of this machine is:" + localip);
 
   

   
} catch (Exception e) {
 
   

   
E.printstacktrace ();
 
   

   
}
 
   

   
InetAddress ia1 = Inetaddress.getlocalhost (); //Get local IP object
 
   

   
System.out.println ("Mac of native is:" + getmacaddress (ia1));
 
   

   
}
 
   

   
 
   

   
Ways to get MAC addresses
 
   

   
 private static String getmacaddress(inetaddress ia) throws Exception {
 
   

   
Get the network interface object (that is, the NIC), and get the MAC address, the MAC address exists in a byte array.
 
   

   
byte [] mac = Networkinterface.getbyinetaddress (IA). Gethardwareaddress ();
 
   

   
The following code is to assemble the MAC address into a string
 
   

   
StringBuffer sb = new stringbuffer ();
 
   

   
 for (int i = 0; i < mac.length; i++) {
 
   

   
if (i! = 0) {
 
   

   
Sb.append ("-");
 
   

   
}
 
   

   
Mac[i] & 0xFF is to convert byte to a positive integer
 
   

   
String s = integer.tohexstring (Mac[i] & 0xFF);
 
   

   
System.out.println ("--------------");
 
   

   
System.err.println (s);
 
   

   
Sb.append (s.length () = = 1 ? 0 + s:s);
 
   

   
}
 
   

   
Change all lowercase letters of the string to uppercase to become a regular MAC address and return
 
   

   
return sb.tostring (). toUpperCase ();
 
   

   
}
 
   

   
}
 
  

The output results are as follows:

The name of the machine is: Pc-daihaijiao
The IP of this machine is: 172.16.0.31

Mac for this machine is: 00-ff-0d-99-5e-1e

   
  
 
   

   
import java.net.Inet4Address;
 
   

   
import java.net.InetAddress;
 
   

   
import java.net.NetworkInterface;
 
   

   
import java.util.Enumeration;
 
   

   
 
   

   
 Public  class networkinterfacetest  {
 
   

   
 
   

   
Public   static void main(string[] args) throws Exception {
 
   

   
Get all the network interfaces for this machine
 
   

   
enumeration<networkinterface> nifs = Networkinterface.getnetworkinterfaces ();
 
   

   
 while (Nifs.hasmoreelements ()) {
 
   

   
NetworkInterface nif = Nifs.nextelement ();
 
   

   
Obtain an IP address that is bound to the network interface, typically with only one
 
   

   
Enumeration<inetaddress> addresses = nif.getinetaddresses ();
 
   

   
 while (Addresses.hasmoreelements ()) {
 
   

   
InetAddress addr = Addresses.nextelement ();
 
   

   
if (Addr instanceof inet4address) { //care only about IPV4 address
 
   

   
SYSTEM.OUT.PRINTLN ("NIC Interface name:" + nif.getname ());
 
   

   
SYSTEM.OUT.PRINTLN ("NIC interface address:" + addr.gethostaddress ());
 
   

   
System.out.println ();
 
   

   
}
 
   

   
}
 
   

   
}
 
   

   
}
 
   

   
}
 
  

The output results are as follows:

Nic Interface Name: Lo
Nic Interface Address: 127.0.0.1


Nic Interface Name: eth0
Nic Interface Address: 172.16.0.31


Nic Interface Name: eth2
Nic Interface Address: 192.168.220.1


Nic Interface Name: wlan2
Nic Interface Address: 192.168.0.108


Nic Interface Name: Eth8
Nic Interface Address: 192.168.138.1

Java gets the native name, IP, MAC address, and network card name