private void jTextField1FocusLost(java.awt.event.FocusEvent evt) {
    JOptionPane.showMessageDialog(null, "Hola "+jTextField1.getText());
}

jtextfield1.addFocusListener(new FocusListener() {

        public void focusLost(FocusEvent arg0) {
            JOptionPane.showMessageDialog(null,"Hola"+jTextField1.getText());

        }

        public void focusGained(FocusEvent arg0) {
            // TODO Auto-generated method stub

        }
    });