上传文件至 'W5'

package w5;

// 基础题：Shape类及其子类
abstract class Shape {
    public abstract void draw();
}

class Circle extends Shape {
    private double r;

    public Circle(double r) {
        this.r = r;
    }

    @Override
    public void draw() {
        System.out.println("绘制圆形，半径：" + r);
    }
}

class Rectangle extends Shape {
    private double width;
    private double height;

    public Rectangle(double width, double height) {
        this.width = width;
        this.height = height;
    }

    @Override
    public void draw() {
        System.out.println("绘制矩形，宽：" + width + "，高：" + height);
    }
}

// 工具类
class ShapeUtil {
    public static void drawShape(Shape s) {
        s.draw();
    }
}

// 主类
public class PolymorphismDemo {
    public static void main(String[] args) {
        System.out.println("=== 基础题测试 ===");
        // 测试Shape类
        Shape circle = new Circle(5);
        Shape rectangle = new Rectangle(4, 6);

        ShapeUtil.drawShape(circle);
        ShapeUtil.drawShape(rectangle);
    }
}

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pangyaxuan 2 weeks ago

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上传文件至 'W5'

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