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Counting Lines

Posted on 2002-07-15
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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?

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Question by:Cosmo439
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tomboshell earned 200 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
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LVL 7

Expert Comment

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