Java get native name, native MAC address, IP address

Package com.howin.util;
 
Import java.net.*; public class Ipconfig {public static void main (string[] args) throws Exception {//TODO auto-generated met
        Hod stub inetaddress ia=null;
             
            try {ia=ia.getlocalhost ();
            String Localname=ia.gethostname ();
            String localip=ia.gethostaddress ();
            SYSTEM.OUT.PRINTLN ("This machine name is:" + localname);
        SYSTEM.OUT.PRINTLN ("The IP of this machine is:" +localip);
        catch (Exception e) {//TODO auto-generated catch block E.printstacktrace (); InetAddress ia1 = Inetaddress.getlocalhost ();//Get local IP object System.out.println ("MAC ...).  
    "+getmacaddress (IA1)); //Get MAC Address method private static String getmacaddress (InetAddress ia) throws exception{//Get Network Interface object (that is, NIC) and get  
        To 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 StrinG StringBuffer sb = new StringBuffer ();  
            for (int i=0;i<mac.length;i++) {if (i!=0) {sb.append ("-");  
            }//mac[i] & 0xFF is to convert the 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);  
    To capitalize all lowercase letters of the string into a regular MAC address and return Sb.tostring (). toUpperCase (); }  
 
}