Determine line count with wordwrap without Textcomponent visible

Hi,
I read a lot of post here that contains code that return number of line occupied by a wrapped text in JTextArea/JTextPane.
However, the code only work if the text component is visible and already on screen.
What I want is calculate the number of line count of wrapped text in those component even before the component is visible.
Currenly, the line count always return 0 because component yet to display on screen.
Can someone tell me how to do this ? thanx.

I've been struggling with this for JTextArea. This seems to work. tp is the JTextArea and I get width from the preferred size.
        public int getLines(float width) {
            View view = tp.getUI().getRootView(tp).getView(0);
            view.setSize(width, (float)Short.MAX_VALUE);
            int preferredHeight = (int)view.getPreferredSpan(View.Y_AXIS);
            int lineHeight = tp.getFontMetrics( tp.getFont() ).getHeight();
            return preferredHeight / lineHeight;
        }

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Hi,
I'm trying to get the kerning character's report from our document. I have done the script without the line count, can you please guide to me "how to add the line count with in this script".
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I disagree to Seshu's answer to question 1.
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ralfph wrote:
hello guys,
I'm just wondering if there is a way to know the number of lines in a file without having to load the file entirely into memory and count the lines.
in my project i have a restriction that says that i'm not allowed to load into memory more than 10 KB. i have to read the file block by block, say ten lines at a time.
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I did try your query with sample records and counts are also correct plz chk the following, for me counts are correct as per your logic -
select aia.invoice_num,aia.invoice_id,aia.invoice_amount,aia.vendor_id,
(select vendor_name from
(select 'XX' vendor_name, 'A' vendor_id from dual union all
select 'XY' vendor_name, 'B' vendor_id from dual union all
select 'XZ' vendor_name, 'C' vendor_id from dual union all
select 'XA' vendor_name, 'D' vendor_id from dual ) po
where vendor_id=aia.vendor_id) vendor_name,
(select count(*) from
(select 1 invoice_id from dual union all
select 1 invoice_id from dual union all
select 1 invoice_id from dual union all
select 2 invoice_id from dual union all
select 3 invoice_id from dual ) aid
where aid.invoice_id=aia.invoice_id) line_count
from
select 10 invoice_num, 1 invoice_id,100 invoice_amount, 'A' vendor_id ,'01-AUG-2012' creation_date from dual union all
select 11 invoice_num, 1 invoice_id,100 invoice_amount, 'A' vendor_id ,'01-AUG-2012' creation_date from dual union all
select 12 invoice_num, 1 invoice_id,100 invoice_amount, 'A' vendor_id ,'01-AUG-2012' creation_date from dual union all
select 13 invoice_num, 2 invoice_id,100 invoice_amount, 'B' vendor_id ,'01-AUG-2012' creation_date from dual union all
select 14 invoice_num, 2 invoice_id,100 invoice_amount, 'B' vendor_id ,'01-AUG-2012' creation_date from dual union all
select 15 invoice_num, 3 invoice_id,100 invoice_amount, 'C' vendor_id ,'01-SEP-2012' creation_date from dual union all
select 16 invoice_num, 4 invoice_id,100 invoice_amount, 'D' vendor_id,'01-OCT-2012' creation_date from dual) aia
where aia.invoice_amount in (select aiab.invoice_amount
from
select 10 invoice_num, 1 invoice_id,100 invoice_amount, 'A' vendor_id ,'01-AUG-2012' creation_date from dual union all
select 11 invoice_num, 1 invoice_id,100 invoice_amount, 'A' vendor_id ,'01-AUG-2012' creation_date from dual union all
select 12 invoice_num, 1 invoice_id,100 invoice_amount, 'A' vendor_id ,'01-AUG-2012' creation_date from dual union all
select 13 invoice_num, 1 invoice_id,100 invoice_amount, 'B' vendor_id ,'01-AUG-2012' creation_date from dual union all
select 14 invoice_num, 1 invoice_id,100 invoice_amount, 'B' vendor_id ,'01-AUG-2012' creation_date from dual union all
select 15 invoice_num, 1 invoice_id,100 invoice_amount, 'C' vendor_id ,'01-SEP-2012' creation_date from dual union all
select 16 invoice_num, 1 invoice_id,100 invoice_amount, 'D' vendor_id,'01-OCT-2012' creation_date from dual) aiab
where aiab.creation_date >='01-AUG-2012'
and aiab.vendor_id=aia.vendor_id
group by aiab.invoice_amount
Having (count(aiab.invoice_amount) >1))
and aia.creation_date >='01-AUG-2012'
o/p
INVOICE_NUM,INVOICE_ID,INVOICE_AMOUNT,VENDOR_ID,VENDOR_NAME,LINE_COUNT
10,1,100,A,XX,3
11,1,100,A,XX,3
12,1,100,A,XX,3
13,2,100,B,XY,1
14,2,100,B,XY,1
-------

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I'm running Illustrator CS6
And Photoshop CS6

Weirdly, yes. That does work.
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import java.awt.KeyboardFocusManager;
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Determine line count with wordwrap without Textcomponent visible

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