I have to create an electronic mail with JavaFX using socket, FXML. I need to create one server and 3 clients that are my three accounts and they must start in parallel. Every client must have an associated thread but my problem is: when I start the first client it works, so the FXML file opens. But when I try to open the second client Intellij shows a pop-up that says to me: Stop And Rerun. In my FXML I have a connect button in which I must choose one of my accounts and then my server says "connect". How can I fix this problem? Opening more than one client? If you don't understand I'll try to be more specific.
MailClient.java
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class MailClient extends Application {
@Override
public void start(Stage stage) {
try{
Parent root = FXMLLoader.load(getClass().getResource("FXMLMailClient.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}catch(Exception e){
e.printStackTrace();
}
}
public static void main(String[] args) throws IOException {
Socket s = new Socket("127.0.0.1", 4445);
PrintWriter out = new PrintWriter(s.getOutputStream(), true);
launch(args);
}
}
Server.java
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class Server {
private int port = 4445;
private ServerSocket s = null;
private static ArrayList<ServerThread> clients = new ArrayList<>();
private static ExecutorService pool = Executors.newFixedThreadPool(3);
public void activate() throws IOException {
try {
s = new ServerSocket(port);
while (true) {
Socket s1 = s.accept();
System.out.println("Server connect");
ServerThread st1 = new ServerThread(s1);
clients.add(st1);
pool.execute(st1);
}
} catch (IOException e) {
System.out.println(e.getMessage());
}finally{
s.close();
}
}
public static void main(String[] args) throws IOException {
Server s = new Server();
s.activate();
}
}
ServerThread.java
import java.io.IOException;
import java.net.Socket;
class ServerThread implements Runnable {
private Socket socket = null;
public ServerThread(Socket socket) throws IOException {
this.socket = socket;
}
@Override
public void run() {
System.out.println("Connected");
// during the run, the following cases will be handled:
// write an email, receive an email, delete an email.
}
}
FXMLMailClientController.java
import java.io.IOException;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
public class FXMLMailClientController {
private boolean isConnected = false;
@FXML
private void handleConnectAction(ActionEvent event) throws IOException {
while (!isConnected) {
System.out.println("Client connect");
isConnected = true;
}
}
}
FXMLMailClient.fxml
<?import java.lang.String?>
<?import javafx.collections.FXCollections?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ChoiceBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane id="AnchorPane" prefHeight="583.0" prefWidth="994.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.FXMLMailClientController">
<children>
<Button fx:id="connectClient" layoutX="70.0" layoutY="116.0" mnemonicParsing="false" onAction="#handleConnectAction" prefWidth="85.0" text="Connetti" />
<Label fx:id="account" layoutX="383.0" layoutY="14.0" prefWidth="344.0" text="" />
<ChoiceBox fx:id="choiceAccount" layoutY="83.0" prefHeight="25.0" prefWidth="225.0">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="email1" />
<String fx:value="email2" />
<String fx:value="email3" />
</FXCollections>
</items>
</ChoiceBox>
</children>
</AnchorPane>
