comment puis-je me connecter au serveur de socket à l'aide de l'adresse ip et numéro de port( le client est en cours d'exécution sur une autre machine que le serveur)

Programme Client

public class client implements Runnable {
protected static String server_IP = "141.117.57.42";
private static final int server_Port = 5555 ;
protected static String client_IP ;
public static void main(String[] args) throws IOException{
final  String host = "localhost";
int init = 0  ;
try {
InetAddress iAddress = InetAddress.getLocalHost();
client_IP = iAddress.getHostAddress();
System.out.println("Current IP address : " +client_IP);
} catch (UnknownHostException e) {
}
try {System.out.println("hello1");
Socket socket = new Socket(server_IP,server_Port);
System.out.println("hello3");
init = initialize(socket);
}catch (SocketException e) {
System.out.println("Error: Unable to connect to server port ");
}
if (init ==  0 ){
System.out.println("error: Failed to initialize ");
System.exit(0);
}
//Thread init_Thread = new Thread();
}
private static int initialize(Socket socket ) throws IOException{
System.out.println("hello");
int rt_value = 0 ;
OutputStream os = socket.getOutputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
PrintWriter pw = new PrintWriter(os, true);
System.out.println("server: " + br.readLine());
pw.println("192.343.34.321");
//BufferedReader userInputBR = new BufferedReader(new InputStreamReader(System.in));
//String userInput = userInputBR.readLine();
//out.println(userInput);
socket.close();
return rt_value = 1 ;
}
public void run(){
}
}

côté serveur programme

public class server {
protected static String server_IP ;
public static void main(String[] args) throws IOException {
int server_Port = 5555 ;
try {
InetAddress iAddress = InetAddress.getLocalHost();
server_IP = iAddress.getHostAddress();
System.out.println("Server IP address : " +server_IP);
} catch (UnknownHostException e) {
}
ServerSocket serverSocket = new ServerSocket(server_Port);
while (true) {
Socket socket = serverSocket.accept();
OutputStream os = socket.getOutputStream();
PrintWriter pw = new PrintWriter(os, true);
InputStreamReader isr = new InputStreamReader(socket.getInputStream());
pw.println("Connection confirmed ");
BufferedReader br = new BufferedReader(isr);
String str = br.readLine();
pw.println("your ip address is " + str);
pw.close();
//socket.close();
//System.out.println("Just said hello to:" + str);
}

comment puis-je me connecter au serveur de socket à l'aide de l'adresse ip et numéro de port( le client est en cours d'exécution sur une autre machine que le serveur)
lorsque je change la server_IP des clients sur "local host", il fonctionne parfaitement
toute aide serait appréciée.