java left logo
java middle logo
java right logo
 

Home arrow Java SE Tips arrow javax.swing arrow How to implement highligting of discontinous string on basis of a delimiter
 
 
Main Menu
Home
Java Tutorials
Book Reviews
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Java Network
Java Forums
Java Blog




Most Visited Tips
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Book Reviews
Top Rated Tips
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Book Reviews


Statistics
Registered Users: 4096
Java SE Tips: 614
Java ME Tips: 202
Java EE Tips: 183
Other API Tips: 779
Java Applications: 298
Java Libraries: 209
Java Games: 16
Book Reviews:
 
 
 
How to implement highligting of discontinous string on basis of a delimiter E-mail
User Rating: / 2
PoorBest 

This Java tip illustrates a method of implementing highligting of discontinous string on basis of a delimiter. The tip includes highlighting multiple, discontiguous regions of a text component.


Image

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

public class MultiHighlight implements ActionListener {

  private JTextComponent comp;
  private String charsToHighlight;

  public MultiHighlight(JTextComponent c, String chars) {
    comp = c;
    charsToHighlight = chars;
  }

  public void actionPerformed(ActionEvent e) {
    // highlight all characters that appear in charsToHighlight
    Highlighter h = comp.getHighlighter();
    h.removeAllHighlights();
    String text = comp.getText().toUpperCase();

    for (int j=0; j < text.length(); j+=1) {
      char ch = text.charAt(j);
      if (charsToHighlight.indexOf(ch>= 0try {
        h.addHighlight(j, j+1, DefaultHighlighter.DefaultPainter);
      catch (BadLocationException ble) { }
    }
  }

  public static void main(String args[]) {
    JFrame frame = new JFrame("MultiHighlight");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JTextArea area = new JTextArea(520);
    area.setText("This is the story\nof the hare who\nlost his spectacles.");
    frame.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);

    JButton b = new JButton("Highlight All Vowels");
    b.addActionListener(new MultiHighlight(area, "aeiouAEIOU"));
    frame.getContentPane().add(b, BorderLayout.SOUTH);
    frame.pack();
    frame.setVisible(true);
   }
}

 Related Tips

 
< Prev   Next >

Page 1 of 0 ( 0 comments )

You can share your information about this topic using the form below!

Please do not post your questions with this form! Thanks.


Name (required)


E-Mail (required)

Your email will not be displayed on the site - only to our administrator
Homepage(optional)



Comment Enable HTML code : Yes No



 
       
         
     
 
 
 
   
 
 
java bottom left
java bottom middle
java bottom right
RSS 0.91 FeedRSS 1.0 FeedRSS 2.0 FeedATOM FeedOPML Feed

Home - About Us - Privacy Policy
Copyright 2005 - 2008 www.java-tips.org
Java is a trademark of Sun Microsystems, Inc.