java-初學Java網絡編程socket，為何我的服務器打不開？

初學Java網絡編程socket，為何我的服務器打不開？

初學Java網絡編程socket，寫了個服務器，但是打不開，求指導。代碼如下

 import java.io.*;
import java.net.*;
import java.util.*;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.TextArea;
import javafx.stage.Stage;

public class Test2_2Server extends Application{
    //創建顯示文本域
    private TextArea area = new TextArea();

    public void start(Stage primaryStage){
        area.setEditable(false);

        Scene scene = new Scene(new ScrollPane(area), 450,300);
        primaryStage.setTitle("Test2_2Server");
        primaryStage.setScene(scene);
        primaryStage.show();

        try {
            //創建一個服務器套接字
            ServerSocket serverSocket = new ServerSocket(8800);
            Platform.runLater(() ->
                area.appendText("Server started at " + new Date() + '\n'));

            int clientNo = 1;
            while (true){
                //監聽
                Socket socket = serverSocket.accept();

                area.appendText("Starting thread for client " + clientNo + " at " + new Date() + '\n');

                //獲取客戶端地址
                InetAddress inetAddress = socket.getInetAddress();
                area.appendText("Client " + clientNo + "'s host name is " + inetAddress.getHostName() + '\n');
                area.appendText("Client " + clientNo + "'s IP Address is " + inetAddress.getHostAddress() + '\n');

                //創建進程
                HandleAClient task = new HandleAClient(socket);

                //開始運行
                new Thread(task).start();

                //客戶端數加一
                clientNo++;
            }
        }
        catch(IOException ex) {
            System.err.println(ex);
        }


    }

    public static void main(String[] args) {
        launch(args);
    }

    //服務器端的任務類
    class HandleAClient implements Runnable{
        private Socket socket;

        public HandleAClient(Socket socket1){
            this.socket = socket1;
        }

        public void run(){
            try {
                //創建輸入輸出流
                DataInputStream inputFromClient = new DataInputStream(socket.getInputStream());
                DataOutputStream outputToClient = new DataOutputStream(socket.getOutputStream());

                while (true){
                    //獲取客戶端數據
                    double annualInterestRate = inputFromClient.readDouble();
                    int numberOfYears = inputFromClient.readInt();
                    double loanAmount = inputFromClient.readDouble();

                    //計算償還額
                    double totalPayment = loanAmount * Math.pow(1 + annualInterestRate * 0.01, numberOfYears);
                    double monthlyPayment = totalPayment / numberOfYears / 12;
                    //將數據傳送至客戶端
                    outputToClient.writeDouble(monthlyPayment);
                    outputToClient.writeDouble(totalPayment);
                    //輸出
                    Platform.runLater(() ->{
                        area.appendText("Annual Interest Rate:" + annualInterestRate + '\n');
                        area.appendText("Number Of Year:" + numberOfYears + '\n');
                        area.appendText("Loan Amount:" + loanAmount + '\n');

                        area.appendText("Monthly Payment:" + monthlyPayment + '\n');
                        area.appendText("Total Payment:" + totalPayment + '\n');
                    });
                }
            }
            catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
} 

最佳回答：

已經找到問題，問題出在JavaFX的application線程，需要給服務器也分配一個線程，否則兩者會發生沖突，導致程序無法正常啟動。
具體修改程序代碼如下,由於有人說看起來太復雜，稍作刪減：

import java.io.*;
import java.net.*;
import java.util.*;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.TextArea;
import javafx.stage.Stage;

public class net extends Application{
    //創建顯示文本域
    private TextArea area = new TextArea();

    public void start(Stage primaryStage){

        Scene scene = new Scene(new ScrollPane(area), 450,300);
        primaryStage.setTitle("Test2_2Server");
        primaryStage.setScene(scene);
        primaryStage.show();

    //此處做修改，為服務器分配線程
        new Thread(() ->{
            try {
                //創建一個服務器套接字
                ServerSocket serverSocket = new ServerSocket(8000);

                area.appendText("Server started at " + new Date() + '\n');

                while (true){

                    //監聽
                    Socket socket = serverSocket.accept();

                    //創建進程
                    HandleAClient task = new HandleAClient(socket);

                    //開始運行
                    new Thread(task).start();

                }
            }
            catch(IOException ex) {
                System.err.println(ex);
            }
        }).start();


    }

    public static void main(String[] args) {
        launch(args);
    }

    //服務器端的任務類
    class HandleAClient implements Runnable{
        private Socket socket;

        public HandleAClient(Socket socket1){
            this.socket = socket1;
        }

        public void run(){
            try {
                //創建輸入輸出流
                DataInputStream input = new DataInputStream(socket.getInputStream());
                DataOutputStream output = new DataOutputStream(socket.getOutputStream());

                while (true){
                    //獲取客戶端數據
                    double annualInterestRate = input.readDouble();
                    int numberOfYears = input.readInt();
                    double loanAmount = input.readDouble();

                    //計算償還額
                    double totalPayment = loanAmount * Math.pow(1 + annualInterestRate * 0.01, numberOfYears);
                    double monthlyPayment = totalPayment / numberOfYears / 12;
                    //將數據傳送至客戶端
                    output.writeDouble(monthlyPayment);
                    output.writeDouble(totalPayment);
                    //輸出
                    Platform.runLater(() ->{
                        area.appendText("Annual Interest Rate:" + annualInterestRate + '\n');
                        area.appendText("Number Of Year:" + numberOfYears + '\n');
                        area.appendText("Loan Amount:" + loanAmount + '\n');

                        area.appendText("Monthly Payment:" + monthlyPayment + '\n');
                        area.appendText("Total Payment:" + totalPayment + '\n');
                    });


                }
            }
            catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
}