Swing/AWT/SWT :: JMenuItem Disable On Load?

I want to disable one of the JMenuItem on load itself but when i tried with following code it is disabling after I selected the JMenuitem.

what additional changes are needed to make it work accordingly.

this.onOffItem = new JMenuItem("Filter");
this.onOffItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
applyTruthFlag(currentBTE.isTruthFlag());
}
});
this.menuFilter.add(this.onOffItem);
private void applyTruthFlag(boolean truthAuswertung) {
this.onOffItem.setEnabled(truthAuswertung);
//this.onOffItem.repaint();
}