Create 09B. Oldest Fairy Tale Character

Week 6: Methods of OO Programming/09B. Oldest Fairy Tale Character

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+In the program, a class named 'FairyTaleCharacter' and several other classes inheriting from it have been defined.
+
+Write a method:
+public static FairyTaleCharacter oldestCharacter(ArrayList<FairyTaleCharacter> characters)
+which takes a 'list of descendants' of the fairy tale character as a 'parameter'.
+The method finds and returns the oldest character in the list.
+
+Note that the classes do not currently implement the Comparable interface, so the oldest character must be found in some other way.
+
+
+
+
+
+
+
+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();
+        
+        int age = r.nextInt(5) + 5;
+        ArrayList<Integer> ages = new ArrayList<>();
+        for (int i=0; i<20; i++) {
+            ages.add(age);
+            age += r.nextInt(10) + 1;
+        }
+        
+        ArrayList<FairyTaleCharacter> characters = new ArrayList<>();
+        String[] colors = "blue yellow red black brown white green".split(" ");
+        
+        for (String name : new String[] {"Buddy", "Bunny", "Rudy"}) {
+            String color = colors[r.nextInt(colors.length)];
+            characters.add(new Nephew(name, ages.remove(r.nextInt(ages.size())), color));
+        }
+        
+        String[] wands = "oak licorice birch alder walnut plastic".split(" ");
+        for (String name : new String[] {"Harry", "Hermione", "Ron"}) {
+            String wand = wands[r.nextInt(wands.length)];
+            characters.add(new Wizard(name, ages.remove(r.nextInt(ages.size())), wand));
+        }
+    
+        String[] superpowers = "supervision flight superstrength literacy super sneeze".split(" ");
+        for (String name : new String[] {"Batguy", "Mouseman", "Bulk"}) {
+            String power = superpowers[r.nextInt(superpowers.length)];
+            characters.add(new Superhero(name, ages.remove(r.nextInt(ages.size())), power));
+        }
+        
+        System.out.println("All fairy tale characters: ");
+        characters.stream().forEach(c -> System.out.println("" + c));
+        System.out.println("Oldest: " + oldestCharacter(characters));
+    }
+
+
+
+
+    //add
+    public static FairyTaleCharacter oldestCharacter(ArrayList<FairyTaleCharacter> characters) {
+    
+    // INITIALISE OLDEST AS 1ST CHARACTER
+    FairyTaleCharacter oldest = characters.get(0);
+    
+    for (FairyTaleCharacter character : characters) {
+        if (character.getAge() > oldest.getAge()) {
+            oldest = character;
+        }
+    }
+    return oldest;
+
+
+
+
+
+}
+
+
+
+
+
+
+
+
+
+}
+
+
+
+
+class FairyTaleCharacter {
+    private String name;
+    private int age;
+    
+    public FairyTaleCharacter(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+    
+    public String getName() {
+        return name;
+    }
+    
+    public int getAge() {
+        return age;
+    }
+    
+    @Override
+    public String toString() {
+        return name + ", " + age + " years old";
+    }
+}
+
+class Nephew extends FairyTaleCharacter {
+    private String hatColor;
+
+    public Nephew(String name, int age, String hatColor) {
+        super(name, age);
+        this.hatColor = hatColor;
+    }
+
+    @Override
+    public String toString() {
+        return super.toString() + ", " + hatColor + " hat";
+    }
+}
+
+class Wizard extends FairyTaleCharacter {
+    private String wand;
+
+    public Wizard(String name, int age, String wand) {
+        super(name, age);
+        this.wand = wand;
+    }
+    
+    @Override
+    public String toString() {
+        return super.toString() + ", " + wand + " wand";
+    }
+}
+
+class Superhero extends FairyTaleCharacter {
+    private String superpower;
+
+    public Superhero(String name, int age, String superpower) {
+        super(name, age);
+        this.superpower = superpower;
+    }
+    
+    @Override
+    public String toString() {
+        return super.toString() + ", superpower: " + superpower;
+    }
+}
+
+
+
+
+
+
+
+
+All fairy tale characters: 
+Buddy, 46 years old, black hat
+Bunny, 69 years old, yellow hat
+Rudy, 111 years old, yellow hat
+Harry, 65 years old, birch wand
+Hermione, 11 years old, birch wand
+Ron, 71 years old, birch wand
+Batguy, 88 years old, superpower: flight
+Mouseman, 55 years old, superpower: superstrength
+Bulk, 6 years old, superpower: literacy
+
+
+Oldest: Rudy, 111 years old, yellow hat
+
+
+
+