在两个单独的JavaFx TextArea中显示两个不同线程的输出 [英] Display output of two different Threads in two separate JavaFx TextArea's

问题描述

大家好，所以我必须创建两个同时出售火车票的线程，并在两个不同的窗口上显示输出，我创建了一个生成票和Runnable的类，但是我不确定如何显示票的输出我试图通过TextBox参数传递两个不同的Text区域框中的两个不同的线程，但是没有任何效果吗?

Hello guys so i have to make two threads that sell train tickets simultaneously and display there output on two different windows, i have create a class that generates the tickets and a Runnable but i am not sure how to display the output of the two different threads in the two different Text area boxes i have tried to pass the TextBox parameter but it didn't work any ideas please ?

SellTicketThreadProc:

SellTicketThreadProc:

public class SellTicketThreadProc implements Runnable {
    private CTicketBiz cTicketBiz;

    public SellTicketThreadProc(CTicketBiz newobj){
        cTicketBiz = newobj;
    }

    public  void sellticket(){
        String color;
        switch(Thread.currentThread().getName()){
            case "Thread 1":
                color = ThreadColor.ANSI_CYAN;
                break;
            case "Thread 2":
                color = ThreadColor.ANSI_PURPLE;
                break;
            default:
                color = ThreadColor.ANSI_GREEN;
        }

        System.out.println(color + Thread.currentThread().getName() + " Random number: " + cTicketBiz.GetRandTicket() + "  Remaining tickets are: " + cTicketBiz.GetBalanceNum() );


    }

    @Override
    public void run() {
        while (cTicketBiz.GetBalanceNum() != 0) {
            sellticket();
        }
    }
}

CTicketBiz:

CTicketBiz:

public class CTicketBiz {

    private int[] m_pTicket; //Point to the array that saves the ticket information
    private int m_nSoldNum; // Sold ticket number
    private int m_nBalanceNum; // Remaining ticket number
    private int m_nTotalNum;



    // Generate the ticket. Initialize the movie ticket array.
    void GenerateTicket(int totalTickets){
        m_nTotalNum = totalTickets;
        m_pTicket = new int[m_nTotalNum];
        m_nBalanceNum = m_nTotalNum;
        m_nSoldNum = 0;
        for (int i = 0; i < m_nTotalNum; i++) {
            m_pTicket[i] = i + 1;
        }
    }


    // Get a ticket randomly
    public synchronized int GetRandTicket(){
        if (m_nBalanceNum <= 0)
            return 0;
        int temp = 0;
        do {
            temp = new Random().nextInt(m_pTicket.length);
        } while (m_pTicket[temp] == 0);
        m_pTicket[temp] = 0;
        m_nBalanceNum--;
        m_nSoldNum++;
        return temp + 1;
    }
    // Get the remaining ticket number
    int GetBalanceNum(){
        return m_nBalanceNum;

    }

}

控制器:

import javafx.fxml.FXML;
import javafx.event.ActionEvent;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.control.TextArea;

public class Controller {


    @FXML
    private TextField ticketsToSell;
    @FXML
    private Button startSelling;
    @FXML
    private TextArea displayThread1;
    @FXML
    private TextArea getDisplayThread2;
    @FXML
    public void onButtonClicked(ActionEvent e){
        if(e.getSource().equals(startSelling)){
            CTicketBiz cTicketBiz = new CTicketBiz();
            cTicketBiz.GenerateTicket(6);
            SellTicketThreadProc tw = new SellTicketThreadProc(cTicketBiz);
            Thread t1 = new Thread (tw,"Thread 1");
            Thread t2 = new Thread (tw,"Thread 2");
            t1.start();
            t2.start();

        }

        }

        @FXML
    public  void handleKeyReleased(){
            String text = ticketsToSell.getText();
            boolean disableButton = text.isEmpty() || text.trim().isEmpty();
            startSelling.setDisable(disableButton);
        }
}

推荐答案

这是一个快速可运行的应用程序，用于演示如何从后台线程更新2个单独的文本区域，就像您确保通读解释发生了什么的注释一样.显然，这与您的程序并不完全相同，但我保留了核心概念.

Here is a quick runnable application to demonstrate how to update 2 separate textareas from background threads like you have make sure to read through the comments that explain whats going on. Obviously this is not the same exact thing as your program but I kept the core concept.

public class Main extends Application {

    private AtomicInteger totalTickets = new AtomicInteger(100);
    private boolean isSellingTickets = false;

    @Override
    public void start(Stage stage) {
        VBox vBoxContainer = new VBox();
        vBoxContainer.setAlignment(Pos.CENTER);
        vBoxContainer.setPrefSize(400,250);

        TextArea textAreaTop = new TextArea();
        TextArea textAreaBottom = new TextArea();
        vBoxContainer.getChildren().addAll(textAreaTop, textAreaBottom);

        Button controlSalesButton = new Button("Start Ticket Sales");
        controlSalesButton.setOnAction(event -> {
            if(isSellingTickets) {
                isSellingTickets = false;
                controlSalesButton.setText("Start Ticket Sales");
            }
            else {
                isSellingTickets = true;
                //I didn't name these threads because I never reference them again
                // of course create var name if you need them
                new Thread(() -> sellTickets(textAreaTop)).start();
                new Thread(() -> sellTickets(textAreaBottom)).start();

                // This is on the main Thread so no need for Platform.runLater(...)
                controlSalesButton.setText("Stop Ticket Sales");
            }

        });
        vBoxContainer.getChildren().add(controlSalesButton);

        stage.setScene(new Scene(vBoxContainer));
        stage.show();
    }

    private void sellTickets(TextArea textArea){//This Whole Function is on another thread don't forget about that
        while(isSellingTickets && totalTickets.get()>1) { //Continue selling tickets until you stop
            // And Make Sure there is tickets to sell

            //Platform.runLater(... is used to update the main thread by pushing updates to
            // the JavaFX Application Thread at some unspecified time in the future.
            Platform.runLater(() -> {
                textArea.appendText("SOLD Ticket Number:" + (int) (Math.random() * 1000 + 1000) + " \t"
                        + totalTickets.decrementAndGet() + " Left to sell\n");
            });

            try {
                Thread.sleep((int) (Math.random() * 1000 + 100));//Different selling speeds this is irrelevant
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

如果您有任何问题，请告诉我

If you have any questions let me know

这篇关于在两个单独的JavaFx TextArea中显示两个不同线程的输出的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！