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9 lines
273 B
9 lines
273 B
public abstract class Shape {
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// 抽象方法：计算面积，子类必须实现
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public abstract double getArea();
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// 通用方法：返回图形名称（子类可重写）
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public String getName() {
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return this.getClass().getSimpleName();
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}
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}
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