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22 lines
528 B
22 lines
528 B
package com.shape;
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/**
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* 抽象类 Shape
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* 提供统一的面积计算接口
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*/
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public abstract class Shape {
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/**
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* 抽象方法：计算图形面积
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* 子类必须实现该方法
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* @return 图形的面积（double类型）
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*/
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public abstract double getArea();
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/**
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* 通用方法：打印图形信息（可选，方便扩展）
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*/
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public void display() {
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System.out.println(this.getClass().getSimpleName() + " 的面积为: " + getArea());
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}
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}
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