gistfile1.java

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

public class ComTestServer {

    public static void main(String[] args) {
        ServerSocket serverSocket = null;
        Socket clientSocket = null;
        ObjectInputStream in = null;
        ObjectOutputStream out = null;
        int serverPort = 8021;
        String message = "";
        
        // Establish connection
        try {
            serverSocket = new ServerSocket(serverPort);
        } catch (IOException e) {
            System.out.println("Could not listen on port " + serverPort);
            System.exit(-1);
        }
        System.out.println("Listening on port " + serverPort);
        
        try {
            clientSocket = serverSocket.accept();
        } catch (IOException e) {
            System.out.println("Accept failed");
            System.exit(-1);
        }
        
        try {
            in = new ObjectInputStream(clientSocket.getInputStream());
            out = new ObjectOutputStream(clientSocket.getOutputStream());
        } catch (IOException ioe) {
            System.out.println("Failed in creating streams");
            System.exit(-1);
        }
        
        // Receive message from Android client
        try {
            message = (String)in.readObject();
        } catch (IOException ex) {
            ex.printStackTrace();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        
        // Print message
        System.out.println("Message: " + message);
        
        // Send message back to client
        System.out.println("Sending back message: " + message);
        try {
            out.writeObject(new String(message));
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        
        // Close connection
        try {
            out.close();
            in.close();
            clientSocket.close();
            serverSocket.close();
        } catch (IOException e) {
            System.out.println("Could not close");
            System.exit(-1);
        }
    }
}