Whois Client : Socket Client « Network « Java Tutorial

1. Java Tutorial
2. Network
3. Socket Client

import java.io.BufferedInputStream;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.InetAddress;
import java.net.Socket;

public class MainClass {

  public final static int DEFAULT_PORT = 43;

  public final static String DEFAULT_HOST = "whois.internic.net";

  public static void main(String[] args) throws Exception {

    String serverName = System.getProperty("WHOIS_SERVER", DEFAULT_HOST);

    InetAddress server = null;
    server = InetAddress.getByName(serverName);
    Socket theSocket = new Socket(server, DEFAULT_PORT);
    Writer out = new OutputStreamWriter(theSocket.getOutputStream(), "8859_1");
    out.write("\r\n");
    out.flush();
    InputStream raw = theSocket.getInputStream();
    InputStream in = new BufferedInputStream(theSocket.getInputStream());
    int c;
    while ((c = in.read()) != -1)
      System.out.write(c);
  }
}