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package __; public class person{ private String name; private int age; public void setage(int age){ this.age=age; } public int getage(){ return this.a 阅读全文
摘要:
abstract class Graphic{ String name; public Graphic(String name){ this.name=name; } abstract public void getlength(); abstract public void getArea();} 阅读全文
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package ____; public class TestPolym{ public static void main(String[]args){ animal a=new animal(); animalcry(a); dog d=new dog(); animalcry(d); } sta 阅读全文