Question

JTextField - java.lang.ArrayIndexOutOfBoundsException

Asked by: 22MadMan22

I receive the following error from JTextField objects:
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException:
at sun.font.FontDesignMetrics.charsWidth(Unknown Source)
at javax.swing.text.Utilities.getTabbedTextOffset(Unknown Source)

and the list keeps going about 20 lines until the EventDispatchThread.run(Unknown Source).  I only get this error if I type in a few characters, back up and insert more characters in the middle or even the beginning of the field and then click and drag to select the last character.  Only from using the mouse do I get the error and only on the last character.  If I don't insert the extra characters I don't receive the error.  If I delete the last character after I receive the error, the error stops coming up until I back up and insert more text.  Please let me know if I can correct this problem or if you need more information.  Thanks.

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Asked On
2009-09-24 at 23:01:26ID24760871
Tags

Java Index Out Of Bounds Error

Topics

Java AWT & Swing

,

New to Java Programming

Participating Experts
2
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0
Comments
6

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Answers

 

by: ksivananthPosted on 2009-09-24 at 23:05:56ID: 25420301

have you done any customization to UI or model?

 

by: dravidnsrPosted on 2009-09-24 at 23:30:18ID: 25420417

You try to call a method of a null object. Check that line and test the objects there for nullness

 

by: 22MadMan22Posted on 2009-09-25 at 01:05:29ID: 25420851

Yes, I use JFrames and JPanels.  Is there something specific I should be avoiding?  Thanks for the quick response.

 

by: dravidnsrPosted on 2009-09-25 at 04:21:48ID: 25421869

ru  check whether (something==null) like this ??

 

by: 22MadMan22Posted on 2009-09-25 at 11:27:04ID: 25425776

I don't call any methods from null objects.  But I noticed that the first line of the error message gives me the index that is out of bounds and it is always 1 greater than there are indexes for text in the box.  If I type "yes" the index out of bounds is 3.  I can also use JPasswordField in the exact same manner on the same frame with no errors.

 

by: 22MadMan22Posted on 2009-09-26 at 00:48:32ID: 25429127

I placed the following in the keyReleased Event and it seems to be working fine.

int i = getCaretPosition();
setText(getText().trim());
setCaretPosition(i);

                                              
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