Week 5: Class hierarchies/15. Own Exceptions 2: SuperGroup+++

Class 'SuperAnimal' is defined in the program. 
Class members include 'name' and 'species', which is written in lower case (for example "cat" or "cow"). 
There is also a getter for species.



Write a class 'SuperGroup' which models 'a group consisting of super animals'.

The class should have the following members:
1
Constructor which receives the name of the group as an argument

2
Method addMember(SuperAnimal animal) which adds a new member to the group. 
However, if after adding a new member, the class would have both, a cat and a dog as member, 
the method throws a new SuperException type exception instead of adding new member.

3
Method outputGroup() which output the name of the group and its members in the following format 
(notice that class SuperAnimal already has a toString method):




Group Woof
Mad Dog (dog), super strength: Super bite
Captain Moo (cow), super strength: Can fly



================



import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;

public class Test{
    public static void main(String[] args){
        final Random r = new Random();
        
        System.out.println("Testing class SuperGroup...");
        
        String[] names = "Woof Oink Miow Moo Barf Grr Sniff".split(" ");
       
        System.out.println("Test 1");
        SuperGroup group = new SuperGroup("Group " + names[r.nextInt(names.length)]);
        System.out.println("Group created!");
        
        ArrayList<SuperAnimal> al = new ArrayList<>();
        
        al.add(new SuperAnimal("pig", "Mr. Piggy", "Superbreath"));
        al.add(new SuperAnimal("cow", "Captain Moo", "Supermilk"));
        al.add(new SuperAnimal("cat", "Felixx", "Super vision"));
        al.add(new SuperAnimal("cat", "Car-Field", "Supercar"));
        Collections.shuffle(al, r);
        
        System.out.println("Adding premitted...");
        for (SuperAnimal animal : al) {
            try {
                group.addMember(animal);
            } 
            catch (SuperException e) {
                System.out.println("An exception was thrown when trying to add animal");
                System.out.println(animal);
            }
            System.out.println("Group now:");
            group.outputGroup();
        }
        
        al.clear();
        al.add(new SuperAnimal("dog", "Super Goofy", "Flying skill"));
        al.add(new SuperAnimal("dog", "Snoopy", "Super imagination"));
        Collections.shuffle(al, r);
        
        System.out.println("Adding forbidden...");
        for (SuperAnimal animal : al) {
            try {
                group.addMember(animal);
            } 
            catch (SuperException e) {
                System.out.println("An exception was thrown when trying to add animal");
                System.out.println(animal);
            }
            System.out.println("Group now:");
            group.outputGroup();
        }
        
        System.out.println("");
        






        
        System.out.println("Test 2");
        group = new SuperGroup("Group " + names[r.nextInt(names.length)]);
        System.out.println("Group created!");
        
        al.clear();
        
        al.add(new SuperAnimal("pig", "Mr. Piggy", "Superbreath"));
        al.add(new SuperAnimal("cow", "Captain Moo", "Super eating"));
        al.add(new SuperAnimal("dog", "Super-Spot", "Super barking"));
        al.add(new SuperAnimal("dog", "Mad Dog", "Super bite"));
        Collections.shuffle(al, r);
        
        System.out.println("Adding premitted...");
        for (SuperAnimal animal : al) {
            try {
                group.addMember(animal);
            } catch (SuperException e) {
                System.out.println("An exception was thrown when trying to add animal");
                System.out.println(animal);
            }
            System.out.println("Group now:");
            group.outputGroup();
        }
        
        al.clear();
        al.add(new SuperAnimal("cat", "Ms. Garfield", "Super appetite"));
        al.add(new SuperAnimal("cat", "Cat Man", "Super purring"));
        Collections.shuffle(al, r);
        
        System.out.println("Adding forbidden...");
        for (SuperAnimal animal : al) {
            try {
                group.addMember(animal);
                
            } catch (SuperException e) {
                System.out.println("An exception was thrown when trying to add animal");
                System.out.println(animal);
            }
            System.out.println("Group now:");
            group.outputGroup();
        }
        
        
       
    }
}






class SuperException extends Exception {
    public SuperException(String message) {
        super(message);
    }
}






class SuperAnimal {
    private String species;
    private String name;
    private String superStrength;
    
    public SuperAnimal(String species, String name, String superStrength) {
        this.species = species;
        this.name = name;
        this.superStrength = superStrength;
    }
    
    public String getspecies() {
        return species;
    }
    
    public String getname() {
        return name;
    }
    
    public String getsuperStrength() {
        return superStrength;
    }

    @Override
    public String toString() {
        return name + " (" + species + "), super strength: " + superStrength;
    }
}







//ADD
class SuperGroup {
    //INITIALISE ATTRIBUTES
    private String name;
    private ArrayList<SuperAnimal> listAnimals = new ArrayList<SuperAnimal>();

    // CONSTRUCTOR
    public SuperGroup(String name) {
        this.name = name;
    }


    // remember to add ' throws SuperException'
    // so compiler knows that this method can throw a custom exception
    public void addMember(SuperAnimal animal) throws SuperException {
        boolean containsCat = false;
        boolean containsDog = false;

        // check existing animals
        for (SuperAnimal animalInList : this.listAnimals) {
            if (animalInList.getspecies().equals("cat")) {
                containsCat = true;
            }
            else if (animalInList.getspecies().equals("dog")) {
                containsDog = true;
            }
        }

        // check new animal
        if (animal.getspecies().equals("cat")) {
            containsCat = true;
        }
        else if (animal.getspecies().equals("dog")) {
            containsDog = true;
        }

        // if we have both cats and dogs in the list, then throw an exception
        if (containsCat && containsDog) {
            throw new SuperException("Group already contains a cat and a dog");
        }
        // if we dont have both cats and dogs in the list, then add SuperAnimal to the list
        this.listAnimals.add(animal);
    }

    public void outputGroup() {
        System.out.println(this.name);
        for (SuperAnimal animal : this.listAnimals) {
            System.out.println(animal);
        }
    }
}




Testing class SuperGroup...
Test 1
Group created!
Adding premitted...
Group now:
Group Miow
Felixx (cat), super strength: Super vision
Group now:
Group Miow
Felixx (cat), super strength: Super vision
Car-Field (cat), super strength: Supercar
Group now:
Group Miow
Felixx (cat), super strength: Super vision
Car-Field (cat), super strength: Supercar
Captain Moo (cow), super strength: Supermilk
Group now:
Group Miow
Felixx (cat), super strength: Super vision
Car-Field (cat), super strength: Supercar
Captain Moo (cow), super strength: Supermilk
Mr. Piggy (pig), super strength: Superbreath

Adding forbidden...
An exception was thrown when trying to add animal
Super Goofy (dog), super strength: Flying skill
Group now:
Group Miow
Felixx (cat), super strength: Super vision
Car-Field (cat), super strength: Supercar
Captain Moo (cow), super strength: Supermilk
Mr. Piggy (pig), super strength: Superbreath

An exception was thrown when trying to add animal
Snoopy (dog), super strength: Super imagination
Group now:
Group Miow
Felixx (cat), super strength: Super vision
Car-Field (cat), super strength: Supercar
Captain Moo (cow), super strength: Supermilk
Mr. Piggy (pig), super strength: Superbreath







Test 2
Group created!
Adding premitted...
Group now:
Group Grr
Super-Spot (dog), super strength: Super barking
Group now:
Group Grr
Super-Spot (dog), super strength: Super barking
Captain Moo (cow), super strength: Super eating
Group now:
Group Grr
Super-Spot (dog), super strength: Super barking
Captain Moo (cow), super strength: Super eating
Mad Dog (dog), super strength: Super bite
Group now:
Group Grr
Super-Spot (dog), super strength: Super barking
Captain Moo (cow), super strength: Super eating
Mad Dog (dog), super strength: Super bite
Mr. Piggy (pig), super strength: Superbreath

Adding forbidden...
An exception was thrown when trying to add animal
Cat Man (cat), super strength: Super purring
Group now:
Group Grr
Super-Spot (dog), super strength: Super barking
Captain Moo (cow), super strength: Super eating
Mad Dog (dog), super strength: Super bite
Mr. Piggy (pig), super strength: Superbreath

An exception was thrown when trying to add animal
Ms. Garfield (cat), super strength: Super appetite
Group now:
Group Grr
Super-Spot (dog), super strength: Super barking
Captain Moo (cow), super strength: Super eating
Mad Dog (dog), super strength: Super bite
Mr. Piggy (pig), super strength: Superbreath