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copied!<p>Although not the identical question, I was searching through the (too many) questions like this one. In my case I wanted to be able to fill two other fields (jtfStarePatReq and jtfStarePatFound which are JTextFields) either by looking up an index directly or by using some spinners and creating a string and then looking that string up (okay, maybe that is too vague but I think it is enough context). What I wanted is that if the user deleted or cleared out the value in the JFormattedTextField jftfStareOpsIndex, then the other two fields would be cleared as well. I was using the .isEmpty() method on the JFormattedTextField to decide if I should use that field OR use the longer computed search method. So I NEED it to be empty if someone goes from looking up their own index to letting the software search for the index. Anyway, I tried catching the commitEdit() exception and setting the value to null and it seems to do the trick.</p> <pre><code>public class stareOpsIndexListener extends KeyAdapter implements FocusListener { public void focusGained(FocusEvent e) { } public void focusLost(FocusEvent e) { try { JFormattedTextField jftf = (JFormattedTextField) e.getComponent(); jftf.commitEdit(); updateStareOpsIndex(jftf); } catch (ParseException ex) { jtfStarePatReq.setText(""); jtfStarePatFound.setText(""); jftfStareOpsIndex.setValue(null); } } public void keyPressed(KeyEvent e) { int key = e.getKeyCode(); if (key == KeyEvent.VK_ENTER) { try { JFormattedTextField jftf = (JFormattedTextField) e.getComponent(); jftf.commitEdit(); updateStareOpsIndex(jftf); } catch (ParseException ex) { jtfStarePatReq.setText(""); jtfStarePatFound.setText(""); jftfStareOpsIndex.setValue(null); } } } } </code></pre>

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