如何在应用程序中使用javax.swing组件?

时间:2013-05-15 04:03:25

标签: java swing applet javafx-2 japplet

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,这不是一个大的程序,但我甚至无法进入Hello, World!状态!我有一个要求让它变得困难:

  

应使用javax.swing组件jButton,jLabel,jTextField,jTextArea,jFrame和jPanel构建GUI。

因此,我下载了NetBeans 7.3并创建了一个JavaFX in Swing应用程序。默认代码显然有效,但它使用Button代替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));
}

所以当我将其更改为使用JButton时,我还必须更改root的构建类型。在我撞到墙壁时,我发现example here(并非直接相关)使用了JRootPane,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,但fxContainer.setScene(new Scene(root));除外,因为root不是Parent

仅供参考,应用程序类实现JApplet并且main init如下所示:

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));
    }
}

1 个答案:

答案 0 :(得分:5)

此代码可用作applet或桌面应用。这里:

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.*;

// <applet code=TutoringCalculator width=400 height=400></applet>
public class TutoringCalculator extends JApplet {

    // The size of an applet is set by the HTML!
    //private static final int JFXPANEL_WIDTH_INT = 300;
    //private static final int JFXPANEL_HEIGHT_INT = 250;

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                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();
            }
        });
    }

    private JPanel swingContainer;

    @Override
    public void init() {
        swingContainer = new JPanel(new BorderLayout());
        add(swingContainer, BorderLayout.CENTER);
        createScene();
    }

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

我无法想象你为什么要使用RootPane,所以我按原样离开了。

进一步提示

  • 规格。提到JFrame但不是JApplet。由于applet的开发,调试和部署非常困难,我建议你完全专注于让它在一个框架中工作。
  • 对于帧定位,您无法前往setLocationByPlatform(true)。有关演示,请参阅this answer