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package com.example.shape;
/**
* 图形抽象类
* 包含抽象方法getArea(),用于计算图形面积
* 包含抽象方法draw(),用于绘制图形
*/
public abstract class Shape {
/**
* 计算图形面积
* @return 图形的面积
*/
public abstract double getArea();
/**
* 绘制图形
*/
public abstract void draw();
}