upcast的精選

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用“upcast”造句大全，upcast造句

用“upcast”造句大全，upcast造句

2018-12-27
Onceanobjecthasbeenupcasttoaninterfacetype,onlythemembersspecifiedintheinterfacecanbeused.Whenaclasshasimplementedaninterface,objectscreatedfromthatclasscanbeupcasttotheinterfacetype,asdemonstratedbyL...