Solved

Counting Lines

Posted on 2002-07-15
2
187 Views
Last Modified: 2010-03-31
How do I count the number of lines in a JTextArea component using a JButton to tell it when to update the count?

0
Comment
Question by:Cosmo439
  • 2
2 Comments
 
LVL 7

Accepted Solution

by:
tomboshell earned 50 total points
ID: 7156443
Have the button retrieve the value returned by JTextArea's 'getLineCount()' method, which returns an int.  

Otherwise, a work around could be first call the Document, then get the elements and send it to an ElementIterator and count.

Document doc = txtA.getDocument();
int ctr=0;
ElementIterator elmIt=new ElementIterator(doc.getDefaultRootElement());
while((elmIt.next() != null)){
   ctr++;
}

something like the code above would be a work-around, but try the getLineCount() method first if it is a JTextArea
0
 
LVL 7

Expert Comment

by:tomboshell
ID: 7168750
Thanks and I hope that it was a help!
Tom
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Application launch issue with Apache Tomcat 5 40
JList custom Cell Renderer refresh 15 56
Cipher Configuration on Apache HTTPD 4 62
web application structure 18 76
Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.

808 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question