import java.net.*;
 
class NetJunk
{
   public static void main () throws UnknownHostException
   {
	  String host = "Newton";
	  InetAddress ia = InetAddress.getByName(host);
 
	  System.out.println ("IP Address = " + ia.getHostAddress());
   }
}

//CommandLine.java
import java.util.*;
import java.io.*;
public abstract class CommandLine
{
 public static void exec(String cmd) throws Exception
 {
  Runtime rt = Runtime.getRuntime();
  Process proc = rt.exec(cmd.toString());
  StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR");
  StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT");
  errorGobbler.start();
  outputGobbler.start();
 }
 public static void exec(String cmd, OutputStream output) throws Exception
 {
  Runtime rt = Runtime.getRuntime();
  Process proc = rt.exec(cmd.toString());
  StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR", output);
  StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT", output);
  errorGobbler.start();
  outputGobbler.start();
 }
}

//StreamGobbler.java
import java.util.*;
import java.io.*;
class StreamGobbler extends Thread
{
	InputStream is;
	String type;
	OutputStream os;
 
	StreamGobbler(InputStream is, String type)
	{
		this(is, type, null);
	}
	StreamGobbler(InputStream is, String type, OutputStream redirect)
	{
		this.is = is;
		this.type = type;
		this.os = redirect;
	}
 
	public void run()
	{
		try
		{
			PrintWriter pw = null;
			if (os != null)
				pw = new PrintWriter(os);
 
			InputStreamReader isr = new InputStreamReader(is);
			BufferedReader br = new BufferedReader(isr);
			String line=null;
			while ( (line = br.readLine()) != null)
			{
				if (pw != null)
					pw.println(line);
				System.out.println(line);	
			}
			if (pw != null)
				pw.flush();
		} catch (IOException ioe)
			{
			ioe.printStackTrace();  
			}
	}
}

CommandLine.exec("ipconfig");