Eu acho que você não entendeu a pergunta .Eu disse que coloquei o actionListner para evitar o warning deste tipo:
Method must have signature "String method(), String method(), String method(String), String
method(String, String), String method(String, String, String), String method(String, String, String, String),
String method(String, String, String, String, String), String method(String, String, String, String, String,
String), String method(String, String, String, String, String, String, String), String method(String, String,
String, String, String, String, String, String), String method(String, String, String, String, String, String,
String, String, String), String method(String, String, String, String, String, String, String, String, String,
String), String method(String, String, String, String, String, String, String, String, String, String, String),
String method(String, String, String, String, String, String, String, String, String, String, String, String),
String method(String, String, String, String, String, String, String, String, String, String, String, String,
String), String method(String, String, String, String, String, String, String, String, String, String, String,
String, String, String), String method(String, String, String, String, String, String, String, String, String,
String, String, String, String, String, String), String method(String, String, String, String, String, String,
String, String, String, String, String, String, String, String, String, String), String method(String, String,
String, String, String, String, String, String, String, String, String, String, String, String, String, String,
String), String method(String, String, String, String, String, String, String, String, String, String, String,
String, String, String, String, String, String, String), String method(String, String, String, String, String,
String, String, String, String, String, String, String, String, String, String, String, String, String, String)" but
has signature "void method(Autor)"
eu só estava questionando que quando uso o actionListner qualquer exceção que possa ocorrer não aparece na tela , mas sim no console.