JComboBox text length limit

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googlegroupsspamfilter@alister.info - 13 Dec 2007 09:27 GMT

Is there a way to set an editable JComboBox to only allow one
character to be entered? I can do it in a JTextField by extending
PlainDocument and setting it to the document on the control but
JComboBox has no setDocument().

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googlegroupsspamfilter@alister.info - 13 Dec 2007 12:51 GMT

On Dec 13, 9:27 am, googlegroupsspamfil...@alister.info wrote:

> Is there a way to set an editable JComboBox to only allow one
> character to be entered? I can do it in a JTextField by extending
> PlainDocument and setting it to the document on the control but
> JComboBox has no setDocument().

Sorted it. A JComboBox can be cast to a JTextField like this:

((JTextField) this.getEditor().getEditorComponent()).setDocument(new
JComboBoxLimitDoc(1));

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