// SClient0.java

import java.io.*;
import java.net.*;

public class SClient0 
{
	/**
	 * The main entry point for the application. 
	 *
	 * @param args Array of parameters passed to the application
	 * via the command line.
	 */
	public static boolean debugging = true;
	
	public static void main (String[] args) throws IOException
	{
		printLocalAddress();

		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
				
		try {
			String name;
			do {
				System.out.print("Enter a hostname or IP address: ");
				System.out.flush();
				name = in.readLine();
				if (name != null)
					printRemoteAddress(name);
			} while (name != null);
			
			System.out.println("exit");
		} catch(IOException ex) {
			System.out.println("Input error:");
			ex.printStackTrace();
		}
		dbgPause();
	}
	
	static void printLocalAddress()
	{
		try {
			InetAddress myself = InetAddress.getLocalHost();
			System.out.println("My name : " + myself.getHostName());
			System.out.println("My IP : " + myself.getHostAddress());
		} catch (UnknownHostException ex) {
			System.out.println("Failed to find my local address:");
			ex.printStackTrace();
		}
	}
	
	static void printRemoteAddress(String name)
	{
		try {
			System.out.println("Looking up " + name + "...");
			InetAddress machine =InetAddress.getByName(name);
			System.out.println("Host name : " + machine.getHostName());
			System.out.println("Host IP : " + machine.getHostAddress() );

			System.out.println("Now... use getAllByName()");
			
			InetAddress names[] = InetAddress.getAllByName(name);
			
			for (int i = 0; i < names.length; i++ ) {
				System.out.println("Host name: " + names[i].getHostName());
				System.out.println("Host IP : " + names[i].getHostAddress());
			}
		} catch ( UnknownHostException ex) {
			System.out.println("Failed to lookup " + name);
			ex.printStackTrace();
		}
	}
	
	protected static void dbgPause()throws IOException
	{
		if (debugging)
			System.in.read();
	}
}