i have an error in my code have do i fix is error im doing java with netbeans in the jframe form

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I have an error in my code. How do I fix this error? I'm doing Java with NetBeans in the JFrame form. Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: Uncompilable source code - Erroneous symbol type: javax.swing.JTextField.isEmpty private void ictoaixctionorjava.awt.event.ActionEvent evt) { 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 = PhoneNumber.getText(); //update database options.addAddress(firstName, lastName, email, phoneNumber); //update table updateTable(); message.setText("New address is successfully added"); }

          I have an error in my code. How do I fix this error? I'm doing Java with NetBeans in the JFrame form.

Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: Uncompilable source code - Erroneous symbol type: javax.swing.JTextField.isEmpty

private void ictoaixctionorjava.awt.event.ActionEvent evt) {
    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 = PhoneNumber.getText();
    
    //update database
    options.addAddress(firstName, lastName, email, phoneNumber);
    
    //update table
    updateTable();
    
    message.setText("New address is successfully added");
}

i have an error in my code have do i fix is error im doing java with netbeans in the jframe form exception in thread awt eventqueue 0 javalangruntimeexception uncompilable source code errone 28426

Added by Catherine I.

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