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57 lines
2.0 KiB
57 lines
2.0 KiB
/**
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* 演示：多态 —— 同一 {@link ShapeUtil#printArea(Shape)} 处理圆、矩形、三角形。
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* 运行：javac *.java 后执行 java ShapeCalculatorDemo
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*/
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public class ShapeCalculatorDemo {
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public static void main(String[] args) {
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Shape circle = new Circle(3.0);
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Shape rectangle = new Rectangle(4.0, 5.0);
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System.out.println("—— 圆 ——");
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ShapeUtil.printArea(circle);
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System.out.println("—— 矩形 ——");
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ShapeUtil.printArea(rectangle);
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System.out.println("—— 多态数组统一处理 ——");
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Shape[] shapes = {circle, rectangle};
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for (Shape s : shapes) {
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ShapeUtil.printArea(s);
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}
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// 测试drawShape方法
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System.out.println("\n—— 测试绘制图形 ——");
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ShapeUtil.drawShape(circle);
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ShapeUtil.drawShape(rectangle);
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// 测试Computer和USB设备
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System.out.println("\n—— 测试Computer和USB设备 ——");
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Computer computer = new Computer();
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Mouse mouse = new Mouse();
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Keyboard keyboard = new Keyboard();
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System.out.println("使用鼠标：");
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computer.useUSB(mouse);
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System.out.println("\n使用键盘：");
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computer.useUSB(keyboard);
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// 测试学生管理系统
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System.out.println("\n—— 测试学生管理系统 ——");
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StudentManagementSystem sms = new StudentManagementSystem();
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// 创建学生对象
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Student student = new Student("张三", "110101200001011234", "2024001", "计算机科学与技术");
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// 创建教师对象
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Teacher teacher = new Teacher("李四", "110101198001011234", "T2024001", "Java程序设计");
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// 添加学生
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System.out.println("添加学生：");
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sms.addPerson(student);
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// 添加教师
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System.out.println("添加教师：");
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sms.addPerson(teacher);
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}
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}
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