Quadratic Equation Calculator Web Server

/*
 * Name: Lu Liu
 * Date: 4/29/2016
 * Course Number: CSC-112
 * Course Name: Intermediate Topics in Java Programming
 * Email: lliu0001@student.stcc.edu
 *
 * Assignment: HW # 16
 * Programe Description:
 * Quadratic Equation Calculator Web Server
 */

import java.io.*;
import java.net.*;
import java.util.Date;
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 CalculatorServer extends Application {
    @Override // Override the start method in the Application class
    public void start(Stage primaryStage) {
        // Text area for displaying contents
        TextArea ta = new TextArea();

        // Create a scene and place it in the stage
        Scene scene = new Scene(new ScrollPane(ta), 450, 200);
        primaryStage.setTitle("Server"); // Set the stage title
        primaryStage.setScene(scene); // Place the scene in the stage
        primaryStage.show(); // Display the stage

        new Thread(() -> {
            try {
                // Create a server socket
                ServerSocket serverSocket = new ServerSocket(5007);
                Platform.runLater(() -> ta.appendText("Server started at " + new Date() + '\n'));

                // Listen for a connection request
                Socket socket = serverSocket.accept();

                // Create data input and output streams
                DataInputStream inputFromClient = new DataInputStream(socket.getInputStream());
                DataOutputStream outputToClient = new DataOutputStream(socket.getOutputStream());

                while (true) {
                    // Receive data from the client
                    try {
                        double a = inputFromClient.readDouble();
                        double b = inputFromClient.readDouble();
                        double c = inputFromClient.readDouble();
                        double d = b * b - 4 * a * c;
                        int status = 0;
                        double root1, root2;

                        // Compute the root
                        if (d == 0) {
                            status = 1;
                        } else if (d > 0) {
                            status = 2;
                        } else if (d < 0) {
                            status = 0;
                        }
                        // Send data back to the client
                        outputToClient.writeInt(status);
                        switch (status) {
                        case 1:
                            outputToClient.writeDouble(-b / (2 * a));
                            break;
                        case 2:
                            outputToClient.writeDouble((-b + Math.sqrt(d)) / (2 * a));
                            outputToClient.writeDouble((-b - Math.sqrt(d)) / (2 * a));
                            break;
                        }

                    } catch (Exception e) {
                        outputToClient.writeInt(0);
                    }
                }

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

    /**
     * The main method is only needed for the IDE with limited JavaFX support.
     * Not needed for running from the command line.
     */
    public static void main(String[] args) {
        launch(args);
    }
}