Key Press event Restriction

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dear sir
Hi,

In text field I want to restrict No of character entered should be only 3 if fourth character entering in same TextFiled it should not allow.

How to solve it ?

Warm regards

sunil

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gandiva_skg

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Newbie Poster

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since Jun 2004

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Jun 21st, 2004

Re: Key Press event Restriction

Do you mean that the textfield should not allow a fourth char to be typed?

Or, that the String returned by getText() is rejected if over 3 chars?

szukalski

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Posting Whiz in Training

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since Jun 2004

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Jun 21st, 2004

Re: Key Press event Restriction

Forgive my ignorance, I forget what the thread titles are when I'm working.
You want to restrict the textfield to only 3 chars right?
A possible solution would be to create a keyListener on the TextField and keep track of the textfield content. Do a check on keyPressed sort of like the following:

Java Syntax (Toggle Plain Text)
void keyPressed(keyEvent e) {
 numberOfCharsInTextField++;
 if (numberOfCharsInTextField > 3) {
  numberOfCharsInTextField--;
  textField.setText(oldText);
 }
}
void keyPressed(keyEvent e) {
 numberOfCharsInTextField++;
 if (numberOfCharsInTextField > 3) {
  numberOfCharsInTextField--;
  textField.setText(oldText);
 }
}

Or something like that.

szukalski

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