Question

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传递TextBox参数，但在两个不同的Text区域框中使用了两个不同的线程，但是没有任何效果吗？

pymongo.errors.ServerSelectionTimeoutError: cluster111-shard-111-111-11111.mongodb.net:27017: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get 
local issuer certificate (_ssl.c:1056),cluster111-shard-111-111-11111.mongodb.net:27017: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local
 issuer certificate (_ssl.c:1056),cluster111-shard-111-111-11111.mongodb.net:27017: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issu
er certificate (_ssl.c:1056)

Answer 1

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

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();
            }
        }
    }
}

如果您有任何问题让我知道

在两个单独的JavaFx TextArea中显示两个不同线程的输出

1 个答案: