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text editing

pia bezzina
Greenhorn

Joined: Dec 16, 2008
Posts: 1
well first question is, how do you limit the number of characters in a JTextField?!

thanks
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 37884
    
  22
Welcome to JavaRanch

That sounds like a Swing-related question, which they like on the Swing forum, so I shall move it.
Maneesh Godbole
Saloon Keeper

Joined: Jul 26, 2007
Posts: 10167
    
    8

The usual way to do is by tweaking the Document#insertString() method.

1) Extend a PlainDocument which implements Document
2) override the PlainDocument#insertString, to check if the threshold is about to be crossed, if yes, do nothing, if no call super.insertString
3) Attach this custom document either in the constructor of your JTextField or calling the setDocument() method.


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subject: text editing