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609 B

基础题

功能:实现Shape父类,Circle、Rectangle子类重写draw()方法,多态调用绘制图形

核心文件:Shape.java、Circle.java、Rectangle.java、ShapeTest.java

运行:编译javac *.java,执行java ShapeTest

结果:输出通用图形、圆形、矩形绘制语句

进阶题

功能:Vehicle抽象类定义run()抽象方法,Car/Bike/Truck子类实现,数组遍历实现多态

核心文件:Vehicle.java、Car.java、Bike.java、Truck.java、VehicleTest.java

运行:编译javac *.java,执行java VehicleTest

结果:输出不同交通工具行驶语句