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20 lines
775 B
20 lines
775 B
/**
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* 测试类，验证图形面积计算器的功能
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*/
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public class Main {
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public static void main(String[] args) {
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// 1. 创建圆形对象（半径5）
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Shape circle = new Circle(5);
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// 2. 创建矩形对象（长4，宽3）
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Shape rectangle = new Rectangle(4, 3);
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// 3. 创建三角形对象（底6，高4）
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Shape triangle = new Triangle(6, 4);
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// 4. 通过工具类统一打印面积（多态效果）
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System.out.println("=== 圆形面积 ===");
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ShapeUtil.printArea(circle);
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System.out.println("\n=== 矩形面积 ===");
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ShapeUtil.printArea(rectangle);
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System.out.println("\n=== 三角形面积 ===");
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ShapeUtil.printArea(triangle);
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}
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}
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