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1
breeswish Sep 15, 2015
AAA 可以是 BBB 的基类
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2
caiyue1993 Sep 16, 2015
AAA 可以是接口，而 BBB 是其具体的实现
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3
yongzhong Sep 16, 2015
java 多态
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4
Ouyangan Sep 16, 2015
AAA -动物 --> BBB-小狗
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