如何在 JavaFX 项目中使用 KeyEvent? [英] How to use KeyEvent in JavaFX project?

问题描述

我已经搜索了很长时间，以了解如何编写 KeyEvent 以允许通过 ENTER 键 单击我的 Button.请注意，我使用的是 JavaFX 和 FXML 文件.

I have searched for a long time for how to write a KeyEvent to allow my Button clicks by ENTER key. Note that I'm using JavaFX and FXML files.

问题是在 FXML 文件的 onKeyTyped 文本字段中设置时，FXML 文件不接受它.它说找不到处理方法.它只接受 ActionEvent 方法，所以我试过这个代码:

The problem is that when set in the onKeyTyped text field in the FXML file, the FXML Files doesn't accept it. It says Handle method not found. It just accept ActionEvent method so I have tried this code:

 @FXML
 private void key (KeyEvent evt) throws IOException{ 
       if (evt.getCode() == KeyEvent.VK_ENTER){
       String az = text1.getText();
       //c.1
       if(az.contains("1")){ 
          String hh = text11.getText();
          Socket socket = null;
          InetSocketAddress isa = new InetSocketAddress (hh,80);  
       } 
    }
}

请问有人可以帮我吗?

推荐答案

您的代码几乎没有问题:

You have few issues with your code :

1. 您正在使用 onKeyTyped 而不是 onKeyPressed.如需更多信息访问此链接

1. You are using onKeyTyped instead of onKeyPressed. For more information visit this link

您很可能正在使用 java.awt.event.KeyEvent，它不适用于 JavaFX 事件.尝试使用 javafx.scene.input.KeyEvent.

You are most probably using java.awt.event.KeyEvent, which will not work with JavaFX events. Try to use javafx.scene.input.KeyEvent.

我得出这个结论的原因是因为JavaFX不支持KeyEvent.VK_ENTER 而是有 KeyCode.ENTER

The reason I came to this conclusion is because JavaFX doesn't support KeyEvent.VK_ENTER but instead have KeyCode.ENTER

下面是一个具体的例子，你可以用同样的方法把它转换成FXML:

A concrete example is shown below, you can use the same to convert it into FXML:

import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class ButtonExample extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {
        BorderPane pane = new BorderPane();
        Button button = new Button("Press Me!");
        pane.setCenter(button);
        Scene scene = new Scene(pane, 200, 200);
        primaryStage.setScene(scene);
        primaryStage.show();

        button.setOnKeyPressed(new EventHandler<KeyEvent>() {

            @Override
            public void handle(KeyEvent event) {
                if (event.getCode() == KeyCode.ENTER) {
                    System.out.println("Enter Pressed");
                }
            }
        });
    }
    
    public static void main(String[] args) {
        launch(args);
    }
}

这篇关于如何在 JavaFX 项目中使用 KeyEvent?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！