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，如何编写 KeyEvent 以允许按下按钮 ENTER键 。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，当在FXML文件的onKeyTyped文本字段中设置时，FXML文件不接受它。它说找不到句柄方法。它只接受 ActionEvent 方法，所以我尝试了这段代码：

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);  
       } 
    }
}

所以请任何人帮助我？

推荐答案

您的代码存在一些问题：

You have few issues with your code :

1. 您使用 onKeyTyped 而不是 onKeyPressed 。有关详细信息，请访问此链接

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

您最有可能使用 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 KeyCode.ENTER

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

一个具体的例子如下所示，您可以使用相同的方法将其转换为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);
    }
}

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