public void method1(Class1 obj1) throws CustomException, throw new CustomException("txt...")

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

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+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
+
+
+