免责声明：我是Java的新手，但我已经构建了13年的.NET应用程序。 
 
 我正在尝试构建这个Java应用程序，它为辅导做一些基本的计算。 说实话，这不是一个大的计划，但我甚至无法将它带到Hello, World! 州！ 我有一个要求让它变得困难： 
 
 
 
 GUI应该使用javax.swing组件jButton，jLabel，jTextField，jTextArea，jFrame和jPanel构建。 
 
 
 因此，我下载了NetBeans 7.3并JavaFX in Swing应用程序中创建了一个JavaFX in Swing 。 默认代码显然有效，但它使用Button而不是JButton ： 
 
private void createScene() {
    Button btn = new Button();
    btn.setText("Say 'Hello World'");
    btn.setOnAction(new EventHandler<ActionEvent>() {
        @Override
        public void handle(ActionEvent event) {
            System.out.println("Hello World!");
        }
    });
    StackPane root = new StackPane();
    root.getChildren().add(btn);
    fxContainer.setScene(new Scene(root));
}
 
 因此，当我将其更改为使用JButton我还必须更改root构建的类型。 在我撞到墙壁的时候，我发现了一个使用JRootPane的示例 （不直接相关），我认为这可能会取代StackPane 。 所以我重构了这样的代码： 
 
private void createScene() {
    JButton btn = new JButton();
    btn.setText("Say 'Hello World'");
    JRootPane root = new JRootPane();
    root.getContentPane().add(btn);
    fxContainer.setScene(new Scene(root));
}
 
 并且该代码很好，除了fxContainer.setScene(new Scene(root)); 因为root不是Parent 。 
 
 仅供参考，应用程序类实现JApplet并具有如下所示的main 和 init ： 
 
public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            try {
                UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
            } catch (Exception e) {
            }

            JFrame frame = new JFrame("Tutoring Calculator");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            JApplet applet = new TutoringCalculator();
            applet.init();

            frame.setContentPane(applet.getContentPane());

            frame.pack();
            frame.setLocationRelativeTo(null);
            frame.setVisible(true);

            applet.start();
        }
    });
}

@Override
public void init() {
    fxContainer = new JFXPanel();
    fxContainer.setPreferredSize(new Dimension(JFXPANEL_WIDTH_INT, JFXPANEL_HEIGHT_INT));
    add(fxContainer, BorderLayout.CENTER);
    // create JavaFX scene
    Platform.runLater(new Runnable() {
        @Override
        public void run() {
            createScene();
        }
    });
}
 
 
 我如何满足上述要求？ 我真的以错误的方式处理这件事吗？ 
 
 SSCCE 
 
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package tutoringcalculator;

import java.awt.BorderLayout;
import java.awt.Dimension;
import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JRootPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

/**
 *
 * @author Owner
 */
public class TutoringCalculator extends JApplet {

    private static final int JFXPANEL_WIDTH_INT = 300;
    private static final int JFXPANEL_HEIGHT_INT = 250;
    private static JFXPanel fxContainer;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
                } catch (Exception e) {
                }

                JFrame frame = new JFrame("Tutoring Calculator");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                JApplet applet = new TutoringCalculator();
                applet.init();

                frame.setContentPane(applet.getContentPane());

                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);

                applet.start();
            }
        });
    }

    @Override
    public void init() {
        fxContainer = new JFXPanel();
        fxContainer.setPreferredSize(new Dimension(JFXPANEL_WIDTH_INT, JFXPANEL_HEIGHT_INT));
        add(fxContainer, BorderLayout.CENTER);
        // create JavaFX scene
        Platform.runLater(new Runnable() {
            @Override
            public void run() {
                createScene();
            }
        });
    }

    private void createScene() {
        JButton btn = new JButton();
        btn.setText("Say 'Hello World'");
        JRootPane root = new JRootPane();
        root.getContentPane().add(btn);
        fxContainer.setScene(new Scene(root));
    }
}

Disclaimer: I am very new to Java, but I've been building .NET applications for 13 years.
 
I'm trying to build this Java application that does some basic calculations for tutoring. It's honestly not that big of a program, but I can't even get it to the Hello, World! state! I have a requirement that's making it difficult:
 
 
 
GUI should be built using javax.swing components jButton, jLabel, jTextField, jTextArea, jFrame, and jPanel.
 
 
So, I downloaded NetBeans 7.3 and created a JavaFX in Swing application. The default code obviously works but it uses Button instead of JButton:
 
private void createScene() {
    Button btn = new Button();
    btn.setText("Say 'Hello World'");
    btn.setOnAction(new EventHandler<ActionEvent>() {
        @Override
        public void handle(ActionEvent event) {
            System.out.println("Hello World!");
        }
    });
    StackPane root = new StackPane();
    root.getChildren().add(btn);
    fxContainer.setScene(new Scene(root));
}
 
so I when I change it to use a JButton I have to also change the type the root is built from. While banging my head against the wall I found an example here (not directly related) that used the JRootPane and I thought that might work in place of the StackPane. So I refactored the code like this:
 
private void createScene() {
    JButton btn = new JButton();
    btn.setText("Say 'Hello World'");
    JRootPane root = new JRootPane();
    root.getContentPane().add(btn);
    fxContainer.setScene(new Scene(root));
}
 
and that code is fine except for fxContainer.setScene(new Scene(root)); because root isn't a Parent.
 
FYI, the application class implements JApplet and has a main and init that looks like this:
 
public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            try {
                UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
            } catch (Exception e) {
            }

            JFrame frame = new JFrame("Tutoring Calculator");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            JApplet applet = new TutoringCalculator();
            applet.init();

            frame.setContentPane(applet.getContentPane());

            frame.pack();
            frame.setLocationRelativeTo(null);
            frame.setVisible(true);

            applet.start();
        }
    });
}

@Override
public void init() {
    fxContainer = new JFXPanel();
    fxContainer.setPreferredSize(new Dimension(JFXPANEL_WIDTH_INT, JFXPANEL_HEIGHT_INT));
    add(fxContainer, BorderLayout.CENTER);
    // create JavaFX scene
    Platform.runLater(new Runnable() {
        @Override
        public void run() {
            createScene();
        }
    });
}
 
 
How can I fulfill the requirement stated above? Am I really going about this whole thing the wrong way?
 
SSCCE
 
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package tutoringcalculator;

import java.awt.BorderLayout;
import java.awt.Dimension;
import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JRootPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

/**
 *
 * @author Owner
 */
public class TutoringCalculator extends JApplet {

    private static final int JFXPANEL_WIDTH_INT = 300;
    private static final int JFXPANEL_HEIGHT_INT = 250;
    private static JFXPanel fxContainer;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
                } catch (Exception e) {
                }

                JFrame frame = new JFrame("Tutoring Calculator");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                JApplet applet = new TutoringCalculator();
                applet.init();

                frame.setContentPane(applet.getContentPane());

                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);

                applet.start();
            }
        });
    }

    @Override
    public void init() {
        fxContainer = new JFXPanel();
        fxContainer.setPreferredSize(new Dimension(JFXPANEL_WIDTH_INT, JFXPANEL_HEIGHT_INT));
        add(fxContainer, BorderLayout.CENTER);
        // create JavaFX scene
        Platform.runLater(new Runnable() {
            @Override
            public void run() {
                createScene();
            }
        });
    }

    private void createScene() {
        JButton btn = new JButton();
        btn.setText("Say 'Hello World'");
        JRootPane root = new JRootPane();
        root.getContentPane().add(btn);
        fxContainer.setScene(new Scene(root));
    }
}

原文：