[問題] 看到一種寫法,不明其意想請教大家
有interface A,一abstract class B implements A,接著
class C extends B implements A.
我想問的就是C已經繼承B了,代表著C已經有實作interface
A的意思,那為什麼在宣告class C時還要寫一次implements A呢?
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