常見(jiàn)例句A licatio that need to define a subcla of OutputStream must always provide at least a method that writes one byte of output. 應(yīng)用程序需要定義OutputStream的子類(lèi),該子類(lèi)至少應(yīng)定義一個(gè)方法,用來(lái)輸出一個(gè)字節(jié)。 返回 subclas