SWING(TextPaneAttributes)

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

public class TextPaneAttributes extends JFrame
{
public TextPaneAttributes()
{
JTextPane textPane = new JTextPane();
StyledDocument doc = textPane.getStyledDocument();
// Set alignment to be centered for all paragraphs
MutableAttributeSet standard = new SimpleAttributeSet();
StyleConstants.setAlignment(standard, StyleConstants.ALIGN_CENTER);
doc.setParagraphAttributes(0, 0, standard, true);
// Define a keyword attribute
MutableAttributeSet keyWord = new SimpleAttributeSet();
StyleConstants.setForeground(keyWord, Color.red);
StyleConstants.setItalic(keyWord, true);
// Add initial text
textPane.setText( "one\ntwo\nthree\nfour\nfive\nsix\nseven\neight\n" );
// Highlight some keywords
doc.setCharacterAttributes(0, 3, keyWord, false);
doc.setCharacterAttributes(19, 4, keyWord, false);
// Add some text
try
{
doc.insertString(0, "Start of text\n", null );
doc.insertString(doc.getLength(), "End of text\n", keyWord );
}
catch(Exception e)
{}
// Add text pane to frame
JScrollPane scrollPane = new JScrollPane( textPane );
scrollPane.setPreferredSize( new Dimension( 200, 200 ) );
getContentPane().add( scrollPane );
// Add a bold button
JButton button = new JButton("bold");
getContentPane().add(button, BorderLayout.SOUTH);
button.addActionListener( new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
new StyledEditorKit.BoldAction().actionPerformed(null);
}
});
}
public static void main(String[] args)
{
TextPaneAttributes frame = new TextPaneAttributes();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setVisible(true);
}
}