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11 lines
363 B
11 lines
363 B
public class ShapeUtil {
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// 统一打印面积的静态方法：支持所有Shape子类
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public static void printArea(Shape shape) {
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if (shape == null) {
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System.out.println("图形不能为空！");
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return;
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}
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double area = shape.getArea();
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System.out.printf("图形面积为：%.2f%n", area);
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}
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}
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