Java by API/java.net/InetAddress

InetAddress: getAllByName(String name)

   <source lang="java">

/*

* Output:
*  
*/

import java.net.InetAddress; public class MainClass {

 public static void main(String args[]) {
   try {
     // Get an address
     InetAddress ias[] = InetAddress.getAllByName("www.google.ru");
     for (int i = 0; i < ias.length; i++) {
       System.out.println(ias[i].getHostName());
       System.out.println(ias[i].getHostAddress());
       byte bytes[] = ias[i].getAddress();
       for (int j = 0; j < bytes.length; j++) {
         if (j > 0)
           System.out.print(".");
         if (bytes[j] >= 0)
           System.out.print(bytes[j]);
         else
           System.out.print(bytes[j] + 256);
       }
       System.out.println("");
     }
   } catch (Exception e) {
     e.printStackTrace();
   }
 }

}

 </source>
   
  
 
  

InetAddress: getByName(String host)

   <source lang="java">
 

import java.net.InetAddress; public class MainClass {

 public static void main(String[] args) {
   try {
     InetAddress ia = InetAddress.getByName("64.21.29.37");
     System.out.println(ia.getHostName());
   } catch (Exception ex) {
     System.err.println(ex);
   }
 }

}

 </source>
   
  
 
  

InetAddress: getCanonicalHostName()

   <source lang="java">
 

import java.net.InetAddress; public class Main {

 public static void main(String[] argv) throws Exception {
   InetAddress addr = InetAddress.getByName("127.0.0.1");
   byte[] ipAddr = new byte[] { 127, 0, 0, 1 };
   addr = InetAddress.getByAddress(ipAddr);
   // Get the host name
   String hostname = addr.getHostName();
   // Get canonical host name
   String canonicalhostname = addr.getCanonicalHostName();
 }

}

 </source>
   
  
 
  

InetAddress: getHostAddress()

   <source lang="java">
 

import java.net.InetAddress; public class MainClass {

 public static void main(String[] args) {
   try {
     InetAddress me = InetAddress.getLocalHost();
     String dottedQuad = me.getHostAddress();
     System.out.println("My address is " + dottedQuad);
   } catch (Exception ex) {
     ex.printStackTrace();
   }
 }

}

 </source>
   
  
 
  

InetAddress: getHostName()

   <source lang="java">
 

import java.net.InetAddress; import java.net.UnknownHostException; public class MainClass {

 public static void main(String[] args) {
   try {
     InetAddress address = InetAddress.getLocalHost();
     System.out.println("My name is " + address.getHostName());
   } catch (UnknownHostException e) {
     System.out.println("I"m sorry. I don"t know my own name.");
   }
 }

}

 </source>
   
  
 
  

InetAddress: getLocalHost()

   <source lang="java">
 

import java.net.InetAddress; public class MainClass {

 public static void main(String[] args) {
   try {
     InetAddress me = InetAddress.getLocalHost();
     String dottedQuad = me.getHostAddress();
     System.out.println("My address is " + dottedQuad);
   } catch (Exception ex) {
     ex.printStackTrace();
   }
 }

}

 </source>
   
  
 
  

InetAddress: isReachable(int timeout)

   <source lang="java">

import java.io.IOException; import java.net.InetAddress; public class MainClass {

 public static void main(String[] args) throws IOException {
   try {
     int timeout = 2000;
     InetAddress[] addresses = InetAddress.getAllByName("www.jexp.ru");
     for (InetAddress address : addresses) {
       if (address.isReachable(timeout))
         System.out.printf("%s is reachable%n", address);
       else
         System.out.printf("%s could not be contacted%n", address);
     }
   } catch (Exception e) {
     System.out.printf("Unknown host: %s%n", "www.jexp.ru");
   }
 }

}

 </source>