Edit html with text area - Java Swing

Java examples for Swing:JTextArea

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Description

Edit html with text area

Demo Code

/* HtmlDemo.java needs no other files. */

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class HtmlDemo extends JPanel implements ActionListener {
    JLabel theLabel;/*  w  ww.ja v a  2  s  .c o m*/
    JTextArea htmlTextArea;

    public HtmlDemo() {
        setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));

        String initialText = "<html>\n" + "Color and font test:\n"
                + "<ul>\n" + "<li><font color=red>red</font>\n"
                + "<li><font color=blue>blue</font>\n"
                + "<li><font color=green>green</font>\n"
                + "<li><font size=-2>small</font>\n"
                + "<li><font size=+2>large</font>\n"
                + "<li><i>italic</i>\n" + "<li><b>bold</b>\n" + "</ul>\n";

        htmlTextArea = new JTextArea(10, 20);
        htmlTextArea.setText(initialText);
        JScrollPane scrollPane = new JScrollPane(htmlTextArea);

        JButton changeTheLabel = new JButton("Change the label");
        changeTheLabel.setMnemonic(KeyEvent.VK_C);
        changeTheLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
        changeTheLabel.addActionListener(this);

        theLabel = new JLabel(initialText) {
            public Dimension getPreferredSize() {
                return new Dimension(200, 200);
            }

            public Dimension getMinimumSize() {
                return new Dimension(200, 200);
            }

            public Dimension getMaximumSize() {
                return new Dimension(200, 200);
            }
        };
        theLabel.setVerticalAlignment(SwingConstants.CENTER);
        theLabel.setHorizontalAlignment(SwingConstants.CENTER);

        JPanel leftPanel = new JPanel();
        leftPanel.setLayout(new BoxLayout(leftPanel, BoxLayout.PAGE_AXIS));
        leftPanel
                .setBorder(BorderFactory.createCompoundBorder(
                        BorderFactory
                                .createTitledBorder("Edit the HTML, then click the button"),
                        BorderFactory.createEmptyBorder(10, 10, 10, 10)));
        leftPanel.add(scrollPane);
        leftPanel.add(Box.createRigidArea(new Dimension(0, 10)));
        leftPanel.add(changeTheLabel);

        JPanel rightPanel = new JPanel();
        rightPanel
                .setLayout(new BoxLayout(rightPanel, BoxLayout.PAGE_AXIS));
        rightPanel.setBorder(BorderFactory.createCompoundBorder(
                BorderFactory.createTitledBorder("A label with HTML"),
                BorderFactory.createEmptyBorder(10, 10, 10, 10)));
        rightPanel.add(theLabel);

        setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        add(leftPanel);
        add(Box.createRigidArea(new Dimension(10, 0)));
        add(rightPanel);
    }

    //React to the user pushing the Change button.
    public void actionPerformed(ActionEvent e) {
        theLabel.setText(htmlTextArea.getText());
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event dispatch thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("HtmlDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Add content to the window.
        frame.add(new HtmlDemo());

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event dispatch thread:
        //creating and showing this application's GUI.
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                //Turn off metal's use of bold fonts
                UIManager.put("swing.boldMetal", Boolean.FALSE);
                createAndShowGUI();
            }
        });
    }
}

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 *
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 * modification, are permitted provided that the following conditions
 * are met:
 *
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 *     notice, this list of conditions and the following disclaimer.
 *
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 *
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
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