Jan
31
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class HtmlDemo extends JPanel
implements ActionListener {
JLabel theLabel;
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();
}
});
}
}
For more details see this page: http://docs.oracle.com/javase/tutorial/uiswing/components/html.html