A.實(shí)例變量是類(lèi)的成員變量 B.實(shí)例變量是用static關(guān)鍵字聲明的 C.方法變量在方法執(zhí)行時(shí)創(chuàng)建 D.方法變量在使用之前必須初始化
A.Multiple listeners can be attached to one component B.Only one listener can be attached to one component C.One listener can receive and process the events from multiple components D.One listener can receive and process the events from only one component
A.executeUpdate() B.createStatement() C.preparedStatement() D.PrepareCall()