Exceptions

hey, i've got this code:

buttonCrypt.addActionListener(new ActionListener(){

publicvoid actionPerformed(ActionEvent e){

Vigenere.setKey(KeyField.getText().trim());

Vigenere.setPlainText(frame.takeTextFromSelected());

frame.createResultFrame(Vigenere.crypt());

dispose();

}

});

and now i want to do something like this: when user not set any text to KeyField (method getText() take nothing from KeyField) and press a buttonCrypt there is shown a JDialog with text: "Please enter a key" and "OK" button. I tried modify this code like that:

buttonCrypt.addActionListener(new ActionListener(){

publicvoid actionPerformed(ActionEvent e){

if(KeyField.getText() ==null || KeyField.getText().equals("")){

//show JDialog etc.....<- i have no problem to do this

}else{

setKey(KeyField.getText());

}

Vigenere.setPlainText(frame.takeTextFromSelected());

frame.createResultFrame(Vigenere.crypt());

dispose();

}

});

but anyway if i compile this code there is shown this information:

"Exception occurred during event dispatching:

java.lang.NullPointerException....". I think it isn't well, is it?

I hope that you understand me and my problem :)

cya

[1976 byte] By [thud_Mikea] at [2007-11-27 5:48:57]