Javafx programming ActionHandler

Question

私は、赤いボタンを押すと背景が赤くなりますが、プライベートにしたのでメインパネルのクラスにはButton Listenerクラスが表示されません私は間違いを続けています。私が何をすることができるかについての提案？

package application; 

import javafx.application.Application; 
import javafx.event.ActionEvent; 
import javafx.event.EventHandler; 
import javafx.geometry.Insets; 
import javafx.geometry.Pos; 
import javafx.stage.Stage; 
import javafx.scene.Scene; 
import javafx.scene.control.Button; 
import javafx.scene.control.Label; 
import javafx.scene.control.RadioButton; 
import javafx.scene.layout.BorderPane; 
import javafx.scene.layout.HBox; 
import javafx.scene.paint.Color; 


public class ColorFactory extends Application { 
    @Override 

    public void start(Stage stage) 
    { 
     BorderPane pane = new BorderPane(); 
     // sets the width and height 
     stage.setHeight(300); 
     stage.setWidth(500); 

     //calls the mainpanel constructor 
     pane.setCenter(new MainPanel()); 

     //make the mainpanel visible using the setVisible(true) 

     //call the stage.setScene 
     stage.setScene(new Scene(pane)); 
     // set title to Color Factory 
     stage.setTitle("Color Factory"); 
     //call stage.show 
     stage.show(); 
    } 
    private class MainPanel extends BorderPane 
    { 


     public MainPanel() 
     { 
      HBox Tpanel = new HBox(25); 
      Tpanel = new HBox(25); 
      Tpanel.setPrefWidth(500); 
      Tpanel.setPrefHeight(50); 
      Tpanel.setAlignment(Pos.TOP_CENTER); 
      Button red = new Button("Red"); 
      Button yellow = new Button("Yellow"); 
      Button orange = new Button("Orange"); 
      red.setStyle("-fx-background-color: red"); 
      orange.setStyle("-fx-background-color: orange;"); 
      yellow.setStyle("-fx-background-color: yellow;"); 
      orange.setOnAction(new ButtonListener()); 
      red.setOnAction(new ButtonListener()); 
      yellow.setOnAction(new ButtonListener()); 
      Tpanel.setStyle("-fx-background-color: white;"); 
      Tpanel.getChildren().addAll(red,yellow,orange); 


      HBox Bpanel = new HBox(15); 
      Bpanel.setPrefWidth(500); 
      Bpanel.setPrefHeight(75); 
      RadioButton green = new RadioButton("Green"); 
      RadioButton blue = new RadioButton("Blue"); 
      RadioButton cyan = new RadioButton("Cyan"); 
      blue.setOnAction(new RadioButtonListener()); 
      green.setOnAction(new RadioButtonListener()); 
      cyan.setOnAction(new RadioButtonListener()); 
      green.setStyle("-fx-background-color: green;"); 
      blue.setStyle("-fx-background-color: blue;"); 
      cyan.setStyle("-fx-background-color: cyan;"); 
      Bpanel.setAlignment(Pos.BOTTOM_CENTER); 
      Bpanel.getChildren().addAll(green,blue,cyan); 

      Label label = new Label("Top buttons change the panel color and bottom radio buttons change the text color"); 
      label.setAlignment(Pos.CENTER_LEFT); 
      label.setTextFill(Color.BLUE); 

      setTop(Tpanel); 
      setBottom(Bpanel); 
      setCenter(label); 

      HBox.setMargin(Tpanel, new Insets(5,10,5,10)); 
      HBox.setMargin(Bpanel, new Insets(5,10,5,10)); 
      HBox.setMargin(label, new Insets(150,10,5,10)); 




     } 

    } 
    private class ButtonListener implements EventHandler<ActionEvent> 
    { 

     public void handle(ActionEvent event) 
     { 

      if(event.getSource() == red) 
      { 
       red.setStyle("-fx-background-color: red;"); 
      } 
      else if(event.getSource() == yellow) 
      { 
       yellow.setStyle("-fx-background-color: yellow;"); 
      } 
      else 
      { 
       orange.setStyle("-fx-background-color: orange;"); 
      } 
     } 
    } 
    private class RadioButtonListener implements EventHandler<ActionEvent> 
    { 
     public void handle(ActionEvent radio) 
     { 
      if(radio.getSource() == green) 
      { 
       label.setTextFill(Color.GREEN); 
      } 
      if(radio.getSource() == blue) 
      { 
       label.setTextFill(Color.BLUE); 
      } 
      if(radio.getSource() == cyan) 
      { 
       label.setTextFill(Color.BLUE); 
      } 
     } 
    } 


    public static void main(String[] args) { 
     launch(args); 
    } 
} 

Answer 1

あなたのボタンとラベルがコンストラクタの内部でちょうど目に見えるので、あなたのプログラムはコンパイルされません。自分の定義をトップレベルのクラスに移動し、他の人に見えるようにします。

import javafx.application.Application; 
import javafx.event.ActionEvent; 
import javafx.event.EventHandler; 
import javafx.geometry.Insets; 
import javafx.geometry.Pos; 
import javafx.stage.Stage; 
import javafx.scene.Scene; 
import javafx.scene.control.Button; 
import javafx.scene.control.Label; 
import javafx.scene.control.RadioButton; 
import javafx.scene.layout.BorderPane; 
import javafx.scene.layout.HBox; 
import javafx.scene.paint.Color; 


public class ColorFactory extends Application { 
    Button red; 
    Button yellow; 
    Button orange; 

    RadioButton green; 
    RadioButton blue; 
    RadioButton cyan; 

    Label label; 

    @Override 
    public void start(Stage stage) 
    { 
     BorderPane pane = new BorderPane(); 
     // sets the width and height 
     stage.setHeight(300); 
     stage.setWidth(500); 

     //calls the mainpanel constructor 
     pane.setCenter(new MainPanel()); 

     //make the mainpanel visible using the setVisible(true) 

     //call the stage.setScene 
     stage.setScene(new Scene(pane)); 
     // set title to Color Factory 
     stage.setTitle("Color Factory"); 
     //call stage.show 
     stage.show(); 
    } 
    private class MainPanel extends BorderPane 
    { 


     public MainPanel() 
     { 
      HBox Tpanel = new HBox(25); 
      Tpanel = new HBox(25); 
      Tpanel.setPrefWidth(500); 
      Tpanel.setPrefHeight(50); 
      Tpanel.setAlignment(Pos.TOP_CENTER); 
      red = new Button("Red"); 
      yellow = new Button("Yellow"); 
      orange = new Button("Orange"); 
      red.setStyle("-fx-background-color: red"); 
      orange.setStyle("-fx-background-color: orange;"); 
      yellow.setStyle("-fx-background-color: yellow;"); 
      orange.setOnAction(new ButtonListener()); 
      red.setOnAction(new ButtonListener()); 
      yellow.setOnAction(new ButtonListener()); 
      Tpanel.setStyle("-fx-background-color: white;"); 
      Tpanel.getChildren().addAll(red,yellow,orange); 


      HBox Bpanel = new HBox(15); 
      Bpanel.setPrefWidth(500); 
      Bpanel.setPrefHeight(75); 
      green = new RadioButton("Green"); 
      blue = new RadioButton("Blue"); 
      cyan = new RadioButton("Cyan"); 
      blue.setOnAction(new RadioButtonListener()); 
      green.setOnAction(new RadioButtonListener()); 
      cyan.setOnAction(new RadioButtonListener()); 
      green.setStyle("-fx-background-color: green;"); 
      blue.setStyle("-fx-background-color: blue;"); 
      cyan.setStyle("-fx-background-color: cyan;"); 
      Bpanel.setAlignment(Pos.BOTTOM_CENTER); 
      Bpanel.getChildren().addAll(green,blue,cyan); 

      label = new Label("Top buttons change the panel color and bottom radio buttons change the text color"); 
      label.setAlignment(Pos.CENTER_LEFT); 
      label.setTextFill(Color.BLUE); 

      setTop(Tpanel); 
      setBottom(Bpanel); 
      setCenter(label); 

      HBox.setMargin(Tpanel, new Insets(5,10,5,10)); 
      HBox.setMargin(Bpanel, new Insets(5,10,5,10)); 
      HBox.setMargin(label, new Insets(150,10,5,10)); 




     } 

    } 
    private class ButtonListener implements EventHandler<ActionEvent> 
    { 

     public void handle(ActionEvent event) 
     { 

      if(event.getSource() == red) 
      { 
       red.setStyle("-fx-background-color: red;"); 
      } 
      else if(event.getSource() == yellow) 
      { 
       yellow.setStyle("-fx-background-color: yellow;"); 
      } 
      else 
      { 
       orange.setStyle("-fx-background-color: orange;"); 
      } 
     } 
    } 
    private class RadioButtonListener implements EventHandler<ActionEvent> 
    { 
     public void handle(ActionEvent radio) 
     { 
      if(radio.getSource() == green) 
      { 
       label.setTextFill(Color.GREEN); 
      } 
      if(radio.getSource() == blue) 
      { 
       label.setTextFill(Color.BLUE); 
      } 
      if(radio.getSource() == cyan) 
      { 
       label.setTextFill(Color.BLUE); 
      } 
     } 
    } 


    public static void main(String[] args) { 
     launch(args); 
    } 
} 

Answer 2

だから、あなたは何を期待していますか？それが「プライベート」の意味です。ソリューション - それをプライベートにしないでください。パッケージをプライベートにするだけでうまくいくはずです。