Respuesta :
Answer:
public class TestAutomobiles {
public static void main(String args[]) {
Automobile obj = new Automobile(1, "Wolkswagen", "Golf", 2007, "GR1GR", 20, 120, "Grey");
System.out.println("Initial Speed: " + obj.getSpeed());
System.out.println("Current Speed with acceleration 100: " + obj.accelerate(100));
System.out.println("Current Speed after using brake : " + obj.brake());
}
}
class Automobile {
private int idNumber, year, milesPerGallon, speed = 0;
private String model, vinNumber, make, color;
public void setIdNumber(int idNumber){
if (idNumber >= 0 && idNumber <= 9999)
this.idNumber = idNumber;
else this.idNumber = 0;
}
public void setModel(String model){
this.model = model;
}
public void setYear(int year){
if (year >= 2000 && year <= 2017)
this.idNumber = idNumber;
else this.year = 0;
}
public void setVinNumber(String vinNumber){
this.vinNumber = vinNumber;
}
public void setMilesPerGalon(int milesPerGallon){
if (milesPerGallon >= 10 && year <= 60)
this.milesPerGallon = milesPerGallon;
else this.milesPerGallon = 0;
}
public void setSpeed(int speed){
this.speed = speed;
}
public void setMake(String make){
this.make = make;
}
public void setColor(String color){
this.color = color;
}
public int getIdNumber(){return idNumber;}
public String getModel(){return model;}
public int getYear(){return year;}
public String getVinNumber(){return vinNumber;}
public int getMilesPerGallon(){return milesPerGallon;}
public int getSpeed(){return speed;}
public String getMake(){return make;}
public String getColor(){return color;}
public int accelerate() {
setSpeed(speed + 5);
return speed;
}
public int brake() {
setSpeed(speed - 5);
return speed;
}
public int accelerate(int s) {
setSpeed(speed + s);
return speed;
}
public int brake(int s) {
setSpeed(speed - s);
return speed;
}
public Automobile(int idNumber, String make, String model, int year, String vinNumber, int milesPerGallon, int speed, String color){
setIdNumber(idNumber);
setModel(model);
setYear(year);
setVinNumber(vinNumber);
setMilesPerGalon(milesPerGallon);
setSpeed(speed);
setMake(make);
setColor(color);
}
}
Explanation:
Required variables are declared as private members.
Their setters and getter are created.
Two accelearate and two break methods are created.
One constructor taking all variables as parameter is created.
In the main, I tested a few functions to check if they work properly.
