EchoServer.java

//Ben Chin
import java.io.InputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

public final class EchoServer {

	public static void main(String[] args) throws Exception {
        	try (ServerSocket serverSocket = new ServerSocket(22222)) {
	            	while (true) {
	       	       		Socket socket = serverSocket.accept();
				Runnable client = () -> {
					try{
						String address = socket.getInetAddress().getHostAddress();
						System.out.printf("Client connected: %s%n", address);
						OutputStream os = socket.getOutputStream();
				               	PrintStream out = new PrintStream(os);
						InputStream is = socket.getInputStream();
						InputStreamReader isr = new InputStreamReader(is, "UTF-8");
				       	    	BufferedReader br = new BufferedReader(isr);
					    	String message;
						while((message = br.readLine())!=null){
							out.println(message);
					    	}
					    	System.out.printf("Client disconnected: %s%n", address);
						socket.close();
					}
					catch (Exception e){}
			       };
			       Thread clientThread = new Thread(client);
			       clientThread.start();
            		}
		}
	}
}