GreetingClient.java

package socket_programming;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

/**
 * The following GreetingClient is a client program that connects to a server by
 * using a socket and sends a greeting, and then waits for a response.
 */

public class GreetingClient {
	public static void main(String[] args) {
		String serverName = args[0];
		int port = Integer.parseInt(args[1]);
		try {
			System.out.println("Connecting to " + serverName + " on port "
					+ port);
			Socket client = new Socket(serverName, port);
			System.out.println("Just connected to "
					+ client.getRemoteSocketAddress());
			OutputStream outToServer = client.getOutputStream();
			DataOutputStream out = new DataOutputStream(outToServer);

			out.writeUTF("Hello from " + client.getLocalSocketAddress());
			InputStream inFromServer = client.getInputStream();
			DataInputStream in = new DataInputStream(inFromServer);
			System.out.println("Server says " + in.readUTF());
			client.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}