JavaFX Button和Scene点击事件代码示例

一时失言乱红尘 2023-10-04 14:28 71阅读 0赞

## 最终效果 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70]

## 代码 ##

### 写在一个类里面 ###

package cn.zxl.StackPane;
    
    import javafx.application.Application;
    import javafx.event.EventHandler;
    import javafx.scene.Scene;
    import javafx.scene.control.Button;
    import javafx.scene.input.MouseEvent;
    import javafx.scene.layout.StackPane;
    import javafx.stage.Stage;
    
    /**
     * @Description: //TODO
     * @Author: zhangxueliang
     * @Create: 2021-05-27 09:04
     * @Version: 1.0
     **/
    public class MyStackPane extends Application implements EventHandler<MouseEvent> {
        
        Button btn;
        @Override
        public void start(Stage primaryStage) throws Exception {
        
            btn = new Button("你好");
            btn.setOnMouseClicked(this);
            StackPane stackPane = new StackPane();
            stackPane.getChildren().add(btn);
            Scene scene = new Scene(stackPane, 200, 200);
            scene.setOnMousePressed(this);
            primaryStage.setScene(scene);
            primaryStage.show();
        }
    
        public static void main(String[] args) {
        
            launch(args);
        }
    
        @Override
        public void handle(MouseEvent event) {
        
            if (event.getSource()==btn){
        
                System.out.println("你点击的是按钮");
            }else {
        
                System.out.println("你点击了场景");
            }
        }
    }

## 也可以单独提取出事件监听类 ##

### 按钮事件监听类 ###

package cn.zxl.StackPane;
    
    import javafx.event.EventHandler;
    import javafx.scene.control.Button;
    import javafx.scene.input.MouseEvent;
    
    /**
     * @Description: //TODO
     * @Author: zhangxueliang
     * @Create: 2021-05-27 09:20
     * @Version: 1.0
     **/
    public class MyMouseEvent implements EventHandler<MouseEvent> {
        
        @Override
        public void handle(MouseEvent event) {
        
            System.out.println("你点击的是按钮");
        }
    }

### 场景事件监听类 ###

package cn.zxl.StackPane;
    
    import javafx.event.EventHandler;
    import javafx.scene.input.MouseEvent;
    
    /**
     * @Description: //TODO
     * @Author: zhangxueliang
     * @Create: 2021-05-27 09:24
     * @Version: 1.0
     **/
    public class SceneMouseEvent implements EventHandler<MouseEvent> {
        
        @Override
        public void handle(MouseEvent event) {
        
            System.out.println("你点击的是场景");
        }
    }

### 调用 ###

package cn.zxl.StackPane;
    
    import javafx.application.Application;
    import javafx.scene.Scene;
    import javafx.scene.control.Button;
    import javafx.scene.layout.StackPane;
    import javafx.stage.Stage;
    
    /**
     * @Description: //TODO
     * @Author: zhangxueliang
     * @Create: 2021-05-27 09:04
     * @Version: 1.0
     **/
    public class MyStackPane2 extends Application{
        
        Button btn;
        @Override
        public void start(Stage primaryStage) throws Exception {
        
            btn = new Button("你好");
            btn.setOnMouseClicked(new MyMouseEvent());
            StackPane stackPane = new StackPane();
            stackPane.getChildren().add(btn);
            Scene scene = new Scene(stackPane, 200, 200);
            scene.setOnMousePressed(new SceneMouseEvent());
            primaryStage.setScene(scene);
            primaryStage.show();
        }
    
        public static void main(String[] args) {
        
            launch(args);
        }
    }

## 匿名内部类方式（推荐） ##

package cn.zxl.StackPane;
    
    import javafx.application.Application;
    import javafx.event.EventHandler;
    import javafx.scene.Scene;
    import javafx.scene.control.Button;
    import javafx.scene.input.MouseEvent;
    import javafx.scene.layout.StackPane;
    import javafx.stage.Stage;
    
    /**
     * @Description: //TODO
     * @Author: zhangxueliang
     * @Create: 2021-05-27 09:04
     * @Version: 1.0
     **/
    public class MyStackPane3 extends Application{
        
        Button btn;
        @Override
        public void start(Stage primaryStage) throws Exception {
        
            btn = new Button("你好");
            btn.setOnMouseClicked(new EventHandler<MouseEvent>() {
        
                @Override
                public void handle(MouseEvent event) {
        
                    System.out.println("你点击的是按钮");
                }
            });
            StackPane stackPane = new StackPane();
            stackPane.getChildren().add(btn);
            Scene scene = new Scene(stackPane, 200, 200);
            scene.setOnMousePressed(new EventHandler<MouseEvent>() {
        
                @Override
                public void handle(MouseEvent event) {
        
                    System.out.println("你点击的是场景");
                }
            });
            primaryStage.setScene(scene);
            primaryStage.show();
        }
    
        public static void main(String[] args) {
        
            launch(args);
        }
    }

## lambda表达式（新手不推荐） ##

package cn.zxl.StackPane;
    
    import javafx.application.Application;
    import javafx.event.EventHandler;
    import javafx.scene.Scene;
    import javafx.scene.control.Button;
    import javafx.scene.input.MouseEvent;
    import javafx.scene.layout.StackPane;
    import javafx.stage.Stage;
    
    /**
     * @Description: //TODO
     * @Author: zhangxueliang
     * @Create: 2021-05-27 09:04
     * @Version: 1.0
     **/
    public class MyStackPane4 extends Application{
        
        Button btn;
        @Override
        public void start(Stage primaryStage) throws Exception {
        
            btn = new Button("你好");
            btn.setOnMouseClicked(event -> {
        
                System.out.println("你点击的是按钮");
            });
            StackPane stackPane = new StackPane();
            stackPane.getChildren().add(btn);
            Scene scene = new Scene(stackPane, 200, 200);
            scene.setOnMousePressed(event -> {
        
                System.out.println("你点击的是场景");
            });
            primaryStage.setScene(scene);
            primaryStage.show();
        }
    
        public static void main(String[] args) {
        
            launch(args);
        }
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20210527091639655.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk=,size_16,color_FFFFFF,t_70