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String problem

Posted on 2003-03-05
Medium Priority
Last Modified: 2010-08-05
I asked the following question before but stuck on implementation of the answer. i wouod appriciate if anyone could specifically tell me how to do it or provide me some fragment of codes.

When I draw a string with the drawString method of the Graphics class, it ignores escape characters such as \n.

For example if I execute the following code:

str="TESTING TEXT: newline:\n tab:\t END";
g.drawString(str, pvalx, pvaly+ascent);

System.out.println cmmand prints out the string in a correct format on the command prompt screen, like

TESTING TEXT: newline:
tab:    END

but drawString ignores the escape characters and prints out text in a single line like

TESTING TEXT:newline:tab:END

Can anyone please tell me how to overcome this problem so that the string can be drawn  in the correct format?


Yes, you should break your text into separate strings and
put them in place one by one.
It's easy to write code that puts every next line so-many pixels lower.

Question by:asukai
LVL 92

Expert Comment

ID: 8075066
> you should break your text into separate strings and
put them in place one by one.

Thats exactly what you have to do.
drawString() does no special interpretation of control characters.

Author Comment

ID: 8076111
->drawString() does no special interpretation of control characters

Yes. I relized that.  But I don't know exactly how I can  break text into separate strings and
put them in place one by one. Do I have to use StringTokenizer and StringBuffer to do this?
LVL 92

Accepted Solution

objects earned 320 total points
ID: 8076181
Yes StringTokenizer should be able to handle it for you.

StringTokenizer st = new StringTokenizer(text, "\n\t", true);

StreamTokenizer is another option.
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Expert Comment

ID: 8077378
if your drawing to an image, you have to respect the bounderies of the image. Something like this:

Graphics2D g2 = image.createGraphics();
Font font = new Font( face, style, size );
g2.setFont( font );
Rectangle2D rect = font.getStringBounds( text, g2.getFontRenderContext() );

Now you can see how the text you are writing relates to the image to which you are writing. Assuming all characters are going to be written in the same Font, do some math determine positioning, then split your text, looking for logical breaks on whitespace and your newline '\n', split it up and go to town. You could even implement this so that if your image is too small, you decrement the font size and start over until it fits or you reach some exception point.

Hope this helps you along. Good luck.
LVL 30

Expert Comment

by:Mayank S
ID: 8087571
You'll have to print the strings separately, specifying the co-ordinates. drawString () ignores escape sequences or control characters.


Expert Comment

ID: 8093490
Use String Tokenizer
LVL 92

Expert Comment

ID: 8095465
> Use String Tokenizer

Please read discussion so far, and try not to repeat previous comments :)

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