나의 하루 (My Day) (Ballad Ver.) (《了解的不多也无妨，是一家人》韩剧插曲) GB9 (길구봉구)
无妨 (《破冰行动》电视剧主题曲) 孙楠 专辑：无妨 语种：国语 本歌词于吾爱知道站收集
EDIT: Solved, see below Hi, In Java, I got an object that could be of any class. BUT - that object will always have to implement an interface, so when I call methods defined by the interface, that o
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