public class TestVehicle {public static void main(String[] args) {Train a = new Train();Plane b = new Plane();a.fee(10);b.fee(400);}}abstract class Vehicle {abstract void fee(int kilometer);}class Train extends Vehicle {void fee(int kilometer) {System.out.println("火车的运费为:" + kilometer * 10d / 100)...
public class TestVehicle {public static void main(String[] args) {Vehicle a = new Train();Vehicle b = new Plane();a.fee();b.fee();}}abstract class Vehicle{publi...
