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18 lines
603 B
18 lines
603 B
public class Main {
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public static void main(String[] args) {
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// 1. 创建不同图形对象（多态：父类引用指向子类对象）
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Shape circle = new Circle(2);
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Shape rectangle = new Rectangle(3, 4);
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Shape triangle = new Triangle(5, 4);
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// 2. 统一打印面积
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System.out.println("=== 圆的面积 ===");
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ShapeUtil.printArea(circle);
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System.out.println("=== 矩形的面积 ===");
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ShapeUtil.printArea(rectangle);
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System.out.println("=== 三角形的面积 ===");
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ShapeUtil.printArea(triangle);
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}
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}
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