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Using the clipboard paste function with a JMaskEdit control

Article ID: 1057
Last updated: 02 Feb, 2008
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Posted: 16 Sep, 1998
by Dean J.
Updated: 02 Feb, 2008
by Dean J.

Using the paste keyboard command (Ctrl-V) makes it possible for a user to paste characters into a JMaskEdit field that should not be allowed. An exception is thrown when the user presses the Enter key due to the invalid characters in the mask control.


The current JMaskEdit-based controls do not guard against the pasting of invalid characters from the clipboard buffer into a mask field. Only characters entered directly from the keyboard are checked.


The following modifications to the JMaskEdit control will allow the user to use the paste (Ctrl-V) keyboard sequence with a mask-controlled field.

Change the paste(int at, String string) method of the JMaskEdit class and add an additional paste method as follows:

  1. Find the file in StudioJcom oguewavelendjfcmaskv2_0
  2. Change the file to look like this:
    public boolean paste(int at, String string) {
    for (int i=0; i
  3. Recompile the file.
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