Task 12/13 Inheritance


#1

I know that I am not the first with this question but I couldn't find the answer. Stuck on task 12 (inheritance), part 2. And I can not understand why? I checked several times, it seems like everything is OK. Call the checkStatus method inside of main. What's wrong? Help me please.

https://www.codecademy.com/courses/learn-java/lessons/object-oriented-programming/exercises/inheritance?action=resume

Dog.java:13: error: cannot find symbol
return age;
^
symbol: variable age
location: class Dog
1 error


class Dog extends Animal {
  int dogsAge;
  public Dog(int age) {
    dogsAge = age;
  }
  public void bark() {
    System.out.println("Woof!");
  }
  public void run(int feet){
    System.out.println("Your dog ran" + feet + "feet!");
  }
  public int getAge(){
    return age;
  }
public static void main(String[] args) {

  Dog spike = new Dog(5);
  spike.bark();
  spike.run(40);
  int spikeAge = spike.getAge();
  System.out.println(spikeAge);
  spike.checkStatus();
  }
}


#2

age is the name of the parameter to the Dog constructor. You can't access this parameter in the getAge method.

The instance variable is called dogsAge.


#3

Thank you so much!!)) Now everything is OK. But I don't understand how the system check the task previously, allow me to do the mistake and go to the next task. By the way, in the instructions to the task 11/13 said: " In between the run and main methods, add a method called getAge that returns age by typing
public int getAge() {
return age;
}"
Is it mistake in the instructions or I again do not understand well?


#4

Hmm, your code looks like in the instructions.

I can't open the code editor on my PC so I can't try it out myself, sorry.


#5

Anyway thanks. You helped me to go to the next task. Maybe I'll sort out with that later.


#6

I am confused. Here's my code:

class Dog extends Animal{
2

3
int age;
4

5
public Dog(int dogsAge) {
6

7
age = dogsAge;
8

9
}
10

11
public void bark({
12
System.out.println("Woof!");}
13

14
public void run(int feet){
15

16
System.out.println("Your dog ran " + feet + " feet!");
17

18
}
19

20
public int getAge(){
21

22
return age;
23

24
}
25

26
public static void main(String[] args) {
27

28
class Vehicle {
29

30
public void checkBatteryStatus() {
31

32
spike.checkStatus();
33

34
Dog spike = new Dog(5);
35

36
spike.bark();
37

38
spike.run(345);
39

40
int spikeAge = spike.getAge();
41

42
System.out.println(spikeAge);
43
}
44

45
}
46

Did you call the checkStatus method inside of main?
Run
Dog.java:11: error: illegal start of type
public void bark({
^
Dog.java:11: error: ')' expected
public void bark({
^
Dog.java:12: error: ';' expected
System.out.println("Woof!");}
^
Dog.java:12: error: expected
System.out.println("Woof!");}
^
Dog.java:12: error: illegal start of type
System.out.println("Woof!");}
^
Dog.java:14: error: class, interface, or enum expected
public void run(int feet){
^
Dog.java:18: error: class, interface, or enum expected
}
^
Dog.java:20: error: class, interface, or enum expected
public int getAge(){
^
Dog.java:24: error: class, interface, or enum expected
}
^
Dog.java:26: error: class, interface, or enum expected
public static void main(String[] args) {
^
10 errors


#7

Sorry about that. here's the code:
class Dog extends Animal{

int age;

public Dog(int dogsAge) {
age = dogsAge;

}

public void bark({
System.out.println("Woof!");}

public void run(int feet){

System.out.println("Your dog ran " + feet + " feet!");

}

public int getAge(){

return age;

}

public static void main(String[] args) {

class Vehicle {

public void checkBatteryStatus() {

spike.checkStatus();

Dog spike = new Dog(5);

spike.bark();

spike.run(345);

int spikeAge = spike.getAge();

System.out.println(spikeAge);
}

}


#8

Here's the errors:

Dog.java:11: error: illegal start of type
public void bark({
^
Dog.java:11: error: ')' expected
public void bark({
^
Dog.java:12: error: ';' expected
System.out.println("Woof!");}
^
Dog.java:12: error: expected
System.out.println("Woof!");}
^
Dog.java:12: error: illegal start of type
System.out.println("Woof!");}
^
Dog.java:14: error: class, interface, or enum expected
public void run(int feet){
^
Dog.java:18: error: class, interface, or enum expected
}
^
Dog.java:20: error: class, interface, or enum expected
public int getAge(){
^
Dog.java:24: error: class, interface, or enum expected
}
^
Dog.java:26: error: class, interface, or enum expected
public static void main(String[] args) {
^
10 errors


#9

I messed up again. Here's my code;
class Dog extends Animal{

int age;

public Dog(int dogsAge) {
age = dogsAge;

}

public void bark({
System.out.println("Woof!");}

public void run(int feet){

System.out.println("Your dog ran " + feet + " feet!");

}

public int getAge(){

return age;

}

public static void main(String[] args) {

spike.checkStatus();

Dog spike = new Dog(5);

spike.bark();

spike.run(345);

int spikeAge = spike.getAge();

System.out.println(spikeAge);
}

}


#10

Here's my errors:
Dog.java:11: error: illegal start of type
public void bark({
^
Dog.java:11: error: ')' expected
public void bark({
^
Dog.java:12: error: ';' expected
System.out.println("Woof!");}
^
Dog.java:12: error: expected
System.out.println("Woof!");}
^
Dog.java:12: error: illegal start of type
System.out.println("Woof!");}
^
Dog.java:14: error: class, interface, or enum expected
public void run(int feet){
^
Dog.java:18: error: class, interface, or enum expected
}
^
Dog.java:20: error: class, interface, or enum expected
public int getAge(){
^
Dog.java:24: error: class, interface, or enum expected
}
^
Dog.java:26: error: class, interface, or enum expected
public static void main(String[] args) {
^
Dog.java:30: error: class, interface, or enum expected
Dog spike = new Dog(5);
^
Dog.java:32: error: class, interface, or enum expected
spike.bark();
^
Dog.java:34: error: class, interface, or enum expected
spike.run(345);
^
Dog.java:36: error: class, interface, or enum expected
int spikeAge = spike.getAge();
^
Dog.java:38: error: class, interface, or enum expected
System.out.println(spikeAge);
^
Dog.java:39: error: class, interface, or enum expected
}
^
16 errors


#11

here you didn't close the brackets


#12

And try to do as I was advised.

This is my code now


#13

Thanks for helping. I really appreciate it.


#14

hi can you help me with mine please.I cant see where i am going wrong

class Dog {
class Dog extends Animal {

int age;

public Dog(int dogsAge) {

  age = dogsAge;

}

public void bark() {

System.out.println("Woof!");

}

public void run(int feet) {

System.out.println("Your dog ran " + feet + " feet!");

}

public int getAge() {

return age;

}

public static void main(String[] args) {

Dog spike = new Dog(5);
spike.bark();
spike.run(40);
int spikeAge = spike.getAge();
System.out.println(spikeAge);
spike.checkStatus();

}

}


#15

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