Inheritance problem first part compiles, but can't get the rest to compile.

Question

Here is the assignment :Lab #8, Objects, Inheritance and Polymorphism
Purpose of Lab: Be able to:
Write a Java program that defines, loads, and uses an array of objects.
Create objects of classes.
Understand the notion of polymorphism.
Write superclasses and subclasses.
Create objects of superclasses and subclasses.
Instructions:
1. Write an Abstract Data Type called Animal. Include two instance variables in this class: a String for name and an integer for age. Write a constructor method that takes two arguments and a second constructor that takes no arguments. Write get and set methods for each of the two instance variables. Write a toString method which displays the values of the instance variables for any object of type Animal. Write a speak method that takes no arguments, returns nothing and displays ?Arg! Arg!? on the monitor.
2. Write a second class called Duck, a subclass of class Animal. Add an additional instance variable to those inherited from Animal: an integer called feathers (this variable is used to store the number of feathers that a particular Duck object has). Write a constructor that takes three arguments and another constructor that takes no arguments. Provide set and get methods for the feathers instance variable. Override the toString method to display the values of all instance variables belonging to a Duck type of object. Override the speak method to display a value of ?Quack! Quack!?.
3. Write a third class called Cow, also a subclass of class Animal. Add an additional instance variable to those inherited from Animal: an integer called spots (this variable is used to store the number of spots feathers that a particular Cow object has). Write a constructor that takes three arguments and another constructor that takes no arguments. Override the toString method to display the values of all instance variables belonging to a Cow type of object. Override the speak method to display a value of ?Mooo! Mooo!?.
4. Finally, enter, compile and execute the Farm class shown below. Make sure that all of your classes (Animal, Duck, Cow and Farm) are in the same folder. Compile all of the classes. Run the Farm program. Answer the questions below. Here is my code so far: public class Animals{
    private String name;
    private int age;
    public Animals()
    public Animals( String nVal, int ageVal)
        name =nVal;
        age = ageVal;
    public void setN(String nVal)
        name = nVal;
    public String getN()
return name;
public void setA( int ageVal)
age = ageVal;
public int getA()
    return age;
public String toString()
    return "\nThe name is" + name +", and the age is" + age + ".";
public class Duck extends Animals
private int feathers;
public Duck()
    super();
    public Duck(String nVal, int ageVal)
    super(nVal,ageVal);
    feathers = feathersVal;
    public void setFeathers(int feathersVal)
    feathers= feathersVal;
    public int getFeathers()
        return feathers;
    public String toString()
    return  "\nThe name is" + super.getN() + ", and the age is" + super.getA()
    + "\n The Duck's feathers are" +feathers+ ".";
public class Cow extends Animals
    private int spots;
    public Cow(int spots)
        super();
        public Cow(String nVal, int spotsVal)
        super(spots);
            spotsColor = spots;
            public void setSpots(int spots)
        spots= spotsColor;
            public int getSpots();
    public String toString()
        return  "\nThe name is" +super.getN()+ ", and the age is" + super.getA()
        + "\n The Duck's feathers are" +feathers+ "\nThe Cow's spots are" +spots+".";
import javax.swing.JOptionPane.JOption;
import javax.swing.*;
public class Farm
    public static void main( String[] args );
    Animals[]farmAnimals = new Animals[4];
            farmAnimals[0] = new Animals("Animals", 3);
            farmAnimals[1] = new Duck("Duck","green,grey feathers");
            farmAnimals[2] = new Cow("Cow", 3, "brown white spots");any help greatly appreciated last assignment of the semester!

Answer 1

Here is the assignment :Lab #8, Objects, Inheritance and Polymorphism
Purpose of Lab: Be able to:
Write a Java program that defines, loads, and uses an array of objects.
Create objects of classes.
Understand the notion of polymorphism.
Write superclasses and subclasses.
Create objects of superclasses and subclasses.
Instructions:
1. Write an Abstract Data Type called Animal. Include two instance variables in this class: a String for name and an integer for age. Write a constructor method that takes two arguments and a second constructor that takes no arguments. Write get and set methods for each of the two instance variables. Write a toString method which displays the values of the instance variables for any object of type Animal. Write a speak method that takes no arguments, returns nothing and displays ?Arg! Arg!? on the monitor.
2. Write a second class called Duck, a subclass of class Animal. Add an additional instance variable to those inherited from Animal: an integer called feathers (this variable is used to store the number of feathers that a particular Duck object has). Write a constructor that takes three arguments and another constructor that takes no arguments. Provide set and get methods for the feathers instance variable. Override the toString method to display the values of all instance variables belonging to a Duck type of object. Override the speak method to display a value of ?Quack! Quack!?.
3. Write a third class called Cow, also a subclass of class Animal. Add an additional instance variable to those inherited from Animal: an integer called spots (this variable is used to store the number of spots feathers that a particular Cow object has). Write a constructor that takes three arguments and another constructor that takes no arguments. Override the toString method to display the values of all instance variables belonging to a Cow type of object. Override the speak method to display a value of ?Mooo! Mooo!?.
4. Finally, enter, compile and execute the Farm class shown below. Make sure that all of your classes (Animal, Duck, Cow and Farm) are in the same folder. Compile all of the classes. Run the Farm program. Answer the questions below. Here is my code so far:
public class Animals{
private String name;
private int age;
public Animals()
public Animals( String nVal, int ageVal) }
name =nVal;
age = ageVal;
public void setN(String nVal)
name = nVal;
public String getN()
return name;
public void setA( int ageVal)
age = ageVal;
public int getA()
return age;
public String toString()
return "\nThe name is"+name+ , and the age is" + age + ".";
{code}{code}
{code}{code}
public class Duck extends Animals
private int feathers;
public Duck()
super();
public Duck(String nVal, int ageVal)
super(nVal,ageVal);
feathers = feathersVal;
public void setFeathers(int feathersVal)
feathers= feathersVal;
public int getFeathers()
return feathers;
public String toString()
return "\nThe name is" + super.getN() + ", and the age is" + super.getA()
+ "\n The Duck's feathers are" +feathers+ ".";
{code}{code}
{code}{code}
public class Cow extends Animals
private int spots;
public Cow(int spots)
super();
public Cow(String nVal, int spotsVal)
super(spots);
spotsColor = spots;
public void setSpots(int spots)
spots= spotsColor;
public int getSpots();
public String toString()
return "string1" + variable1 + "string2" + variable2;
{code}{code}
{code}{code}
import javax.swing.JOptionPane.JOption;
import javax.swing.*;
public class Farm
public static void main( String[] args ){
Animals[]farmAnimals = new Animals[4];
farmAnimals[0] = new Animals("Animals", 3);
farmAnimals[1] = new Duck("Duck","green,grey feathers");
farmAnimals[2] = new Cow("Cow", 3, "brown white spots");
{code}{code}
In Duck The compile errors are as follows:java1: cannot find symbol symbol class Duck extends Animals with the caret under A in Animals
java 13 same as above but for feathers = feathersVal; with the caret under f in feathersVal
java 25 same error caret under s in both supers
Cow has 1 error in java 20 class,interface,or enum expected caret under S in String
Farm a parsing error at last brace but when I add another ending brace i get
java1 cannot find symbol class JOption caret under period between JOptionPane.JOption
java 9 cannot find symbol caret under A in Animals[]farm etc also under A in new Animals
java 10 cannot find symbol caret under D in Duck
java 12 cannot find symbol caret under C in new Cow