I am creating a java server and a java client. I need to send from server to client and viceversa an object and then an array of objects. How can I achieve this? Do I need to serialize the objects classes?
This is the server:
import java.io.*;
import java.net.*;
public class Server extends Thread {
private final ServerSocket Server;
public static void main(String[] args) throws Exception {
new Server();
}
public Server() throws Exception {
Server = new ServerSocket(3000);
System.out.println("Server started on port 3000.");
this.start();
}
@Override
public void run() {
while (true) {
try {
System.out.println("Server is listening to new connections...");
Socket client = Server.accept();
System.out.println("Connection accepted from: " + client.getInetAddress());
Connect c = new Connect(client);
} catch (IOException exception) {
System.out.println(exception.getMessage());
}
}
}
class Connect extends Thread {
private Socket client = null;
BufferedReader in = null;
PrintStream out = null;
public Connect(Socket clientSocket) {
client = clientSocket;
try {
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
out = new PrintStream(client.getOutputStream(), true);
} catch (IOException mainException) {
try {
client.close();
} catch (IOException exception) {
System.out.println(exception.getMessage());
}
}
this.start();
}
@Override
public void run() {
try {
out.close();
in.close();
client.close();
} catch (IOException exception) {
System.out.println(exception.getMessage());
}
}
}
This is my client:
import java.io.*;
import java.net.*;
public class Client {
String remoteAddress = "localhost";
BufferedReader in = null;
PrintStream out = null;
Socket socket = null;
String message = null;
String username = null;
String password = null;
public Client(String username, String password) {
this.username = username;
this.password = password;
}
public String connect() {
try {
// begin a new client connection
socket = new Socket(remoteAddress, 3000);
// open I-O channels
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintStream(socket.getOutputStream(), true);
} catch (Exception exception) {
return false;
System.out.println(exception.getMessage());
}
return "ERROR";
}
public boolean disconnect() throws IOException {
// close flushes I-O with the server
out.close();
in.close();
return true;
}
}
This, instead, is one class:
class Contact {
private String name;
private String surname;
private String telephone;
private String birthday;
public String getName() {
return name;
}
public String getSurname() {
return surname;
}
public String getTelephone() {
return telephone;
}
public String getBirthday() {
return birthday;
}
public void setName(String value) {
name = value;
}
public void setSurname(String value) {
surname = value;
}
public void setTelephone(String value) {
telephone = value;
}
public void setBirthday(String value) {
birthday = value;
}
}
Currently just the server can send data (objects array or only object) to client but I'm thinking about make both able to do.
Also, it'd be nice about to send an object (like the class above), an array of same object and an array of different objects (I can't obtain it with classic arrays, right? May I use ArrayList?)
Thank you.
