interface:Person;
class:Man implements Person;
class: Woman implements Person;
调用:
Person person = new Man();//这个就是男人;
Person person = new Woman();//这个就是女人;
class:Man implements Person;
class: Woman implements Person;
调用:
Person person = new Man();//这个就是男人;
Person person = new Woman();//这个就是女人;
解决方案 »
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