private void jButton1Action Performed (java.awt.event.ActionEvent evt) { message.setText (""); if (firstname.isEmpty() && lastname.isEmpty() && Email.isEmpty() && Phone Number.isEmpty()) {...

private void jButton1Action Performed (java.awt.event.ActionEvent evt) { message.setText (""); if (firstname.isEmpty() && lastname.isEmpty() && Email.isEmpty() && Phone Number.isEmpty()) { message.setText ("You must enter a firstname, lastname, email, and phone number"); else{ String firstName= firstname.getText(); String lastName=lastname.getText(); String email=Email.getText(); String phoneNumber=Phone Number.getText(); //update database options.addAddress (firstName, lastName, email, phoneNumber); //update table updateTable(); message.setText ("New address is successfully added!");