Urgent Regarding Jtable TAB and Arrow keys

Hi guys and gals,
In my project i need urgnet help regarding Jtable.I want to use DOWN ARROW key same as TAB function.When i reach the first row last editing coulmn by using arrow key,then i habe to creating a new row with default values.And if press UP key if that row contains no values i have to delete.Plz help me in this regard.
sreeni

I meant that the laptop freezes in gdm and in console (tty1). In gdm i can't even type any character. And in console i can login but when i press the tab key (autocompletation) it stops. The only thing i can do is press the power button.
Actually my keymap is es_ES. And i think that it's working fine because the n tilde and pipes work fine.

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I meant that the laptop freezes in gdm and in console (tty1). In gdm i can't even type any character. And in console i can login but when i press the tab key (autocompletation) it stops. The only thing i can do is press the power button.
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Urgent Regarding Jtable TAB and Arrow keys

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