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Custom MaskFormatter

J Wallace

Joined: Jan 30, 2008
Posts: 5

I am trying to create a MaskFormatter that formats an elapsed time. The number of elapsed seconds is stored as a Double and should be formatted similar to days:hh:mm:ss.sss. I have come up with an extension to MaskFormatter, inspired by, which seems to do the job. However, a problem arises after initially inputting an elapsed time. After the initial edit, the value cannot be edited. What am I doing wrong? Here is the code with a main that illustrates the problem:

Any ideas?
Rob Camick
Ranch Hand

Joined: Jun 13, 2009
Posts: 2446
Well, I don't know anything about how the formatters work but I replaced your custom methods with:

and the returned class is a String, not a Double so I would guess that is the difference.
I agree. Here's the link:
subject: Custom MaskFormatter
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