class Vehicle { public int doors; public int seats; public int wheels; Vehicle() { wheels=4; doors=4; seats=4; } } //This class inherits Vehicle.java class Car extends Vehicle { public String toString() { return "This car has "+seats+" Seats, "+doors+" Doors "+"and "+wheels+" wheels."; } } //This class inherits Vehicle.java class MotorCycle extends Vehicle { MotorCycle() { wheels=2; doors=0; seats=1; } void setSeats(int num) { seats=num; } public String toString() { return "This motorcycle has "+seats+" Seats, "+doors+" Doors "+"and "+wheels+" wheels."; } } //This class inherits Vehicle.java public class Truck extends Vehicle class Truck extends Vehicle { boolean isPickup; Truck() { isPickup=true; } Truck(boolean aPickup) { this(); isPickup=aPickup; } Truck(int doors, int seats, int inWheels, boolean isPickup) { this.doors=doors; this.seats=seats; wheels=inWheels; this.isPickup=isPickup; } public String toString() { return "This "+(isPickup?"pickup":"truck")+" has "+seats+" Seats, "+doors+" Doors "+"and "+wheels+"wheels."; } } //This class tests the classes that inherit Vehicle.java public class VehiclesTest { public static void main(String args[]) { MotorCycle mine = new MotorCycle(); System.out.println(mine); Car mine2 = new Car(); System.out.println(mine2); mine2.doors=2; System.out.println(mine2); Truck mine3 = new Truck(); System.out.println(mine3); Truck mine4 = new Truck(false); mine4.doors=2; System.out.println(mine4); } }