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9 lines
274 B
9 lines
274 B
public class ShapeUtil {
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public static void printArea(Shape shape) {
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if (shape == null) {
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System.out.println("图形对象不能为空！");
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return;
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}
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System.out.printf("图形面积为：%.2f%n", shape.getArea());
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}
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}
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