BippyGrippy

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class EchoClient {

	static final int PORT = 9984;
	static Scanner kb = new Scanner(System.in);

	public static void main(String[] args) throws IOException {
		System.out.println("Please choose an option:");
		int option = 0;
		System.out.println("Host [1]");
		System.out.println("Connect [2]");
		while (true) {
			try {
				option = kb.nextInt();
				break;
			} catch (Exception e) {
				System.err.println("That option is invalid!");
				kb.nextLine();
			}
		}
		switch (option) {
		case 1:
			System.out.println("Hosting converstation...");
			host();
			break;
		case 2:
			System.out.println("Connect to what host?");
			String connectHost = "";
			while (true) {
				try {
					connectHost = kb.nextLine();
					break;
				} catch (Exception e) {
					System.err.println("That option is invalid!");
					kb.nextLine();
				}
			}
			client(connectHost);
		}
	}

	public static void host() {
		System.out.println("Running on port " + PORT + ".");
		try {
			System.out.println(InetAddress.getLocalHost());
		} catch (UnknownHostException e1) {
			System.out.println("Issue finding IP.");
		}

		while (true) {
			try (
					ServerSocket serverSocket =
					new ServerSocket(PORT);
					Socket clientSocket = serverSocket.accept();
					PrintWriter out =
							new PrintWriter(clientSocket.getOutputStream(), true);
					BufferedReader in = new BufferedReader(
							new InputStreamReader(clientSocket.getInputStream()));
					) {
				String inputLine;
				while ((inputLine = in.readLine()) != null) {
					out.println(inputLine);
				}
			} catch (IOException e) {
				System.out.println("Exception caught when trying to listen on port "
						+ PORT + " or listening for a connection.");
				System.out.println(e.getMessage());
			}
		}
	}

	public static void client(String HOST) {
		try (
				Socket echoSocket = new Socket(HOST, PORT);
				PrintWriter out =
						new PrintWriter(echoSocket.getOutputStream(), true);
				BufferedReader in =
						new BufferedReader(
								new InputStreamReader(echoSocket.getInputStream()));
				BufferedReader stdIn =
						new BufferedReader(
								new InputStreamReader(System.in))
				) {
			String userInput;
			while ((userInput = stdIn.readLine()) != null) {
				out.println(userInput);
				System.out.println(in.readLine());
			}
		} catch (UnknownHostException e) {
			System.err.println("Host " + HOST + " is looking pretty fishy there, bud.");
			System.exit(1);
		} catch (IOException e) {
			System.err.println("Couldn't get I/O for the connection to " + HOST);
			System.exit(1);
		}

	}

}