EventHandler不接受参数-JavaFX[重复]

Question

我为“MainWindow.fxml”文件构建了一个相当简单的控制器来处理按钮。我遵循了本教程。我已经在fxml文档中正确设置了fx:id。然而，在编译时，我得到以下错误警告

java： typejava.beans.EventHandler不接受参数

对于生产线

createVizButton.setOnAction(new EventHandler<ActionEvent>(){

我的完整控制器类如下所示...

package sample;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import java.awt.event.ActionEvent;
import java.beans.EventHandler;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.scene.control.Button;

public class MainController implements Initializable{
    @FXML
    private Button createVizButton;
    @Override // This method is called by the FXMLLoader when initialization is complete
    public void initialize(URL fxmlFileLocation, ResourceBundle resources) {
        assert createVizButton != null : "fx:id=\"createButton\" was not injected: check your FXML file 'MainWindow.fxml'.";

        // initialize your logic here: all @FXML variables will have been injected
        createVizButton.setOnAction(new EventHandler<ActionEvent>(){
            @Override
            public void handle(ActionEvent event) {
                System.out.println("That was easy, wasn't it?");
            }
        });
    }
}

感谢任何帮助，提前感谢。

Answer 1

您的导入不正确：

import java.awt.event.ActionEvent;
import java.beans.EventHandler;

应该是

import javafx.event.ActionEvent;
import javafx.event.EventHandler;