Unit 9

public class Animal {
    protected double mass; //protected so the attribute isn't modified outside by outside modifiers
    protected double lifespan;
    public Animal(double mass, double lifespan) { //constructor with parameters of mass and lifespan
        this.mass = mass;
        this.lifespan = lifespan;
    }

    public class Dog extends Animal { //extends superclass into dog subclass
    
        protected String color; 
        
        public Dog(double mass, double lifespan, String color) { //another constructor
            super(mass, lifespan);
            this.color = color;
        }
    }
}

public class Animal {
   protected double mass;
   protected double lifespan;
   public Animal(double mass, double lifespan) {
       this.mass = mass;
       this.lifespan = lifespan;
   }
   public void sound() {
       System.out.println("sound");
   }

   public class Dog extends Animal {
   
       protected String color; 
       
       public Dog(double mass, double lifespan, String color) {
           super(mass, lifespan);
           this.color = color;
       }
       @Override
       public void sound() { //overrides the sound method, by printing woof instead of sound
           System.out.println("woof");
       }
   }
}

a f g l  
b e h k  
c d i j  

public class Animal {
    protected double mass;
    protected double lifespan;
    public Animal(double mass, double lifespan) {
        this.mass = mass;
        this.lifespan = lifespan;
    }
    public void sound() {
        System.out.println("sound");
    }

    public void die(boolean a) {
        System.out.println("the cat is dead: " + a); //method to be overloaded
    }
    public class Dog extends Animal {
    
        protected String color; 
        
        public Dog(double mass, double lifespan, String color) {
            super(mass, lifespan);
            this.color = color;
        }
        @Override
        public void sound() {
            System.out.println("woof");
        }
    }
    public class Cat extends Animal { //make  another subclass for Cat that extends off of Animal 
    
        protected String breed; 
        
        public Cat(double mass, double lifespan, String breed) {
            super(mass, lifespan);
            this.breed = breed;
        }
        @Override
        public void sound() { //overrides the sound
            System.out.println("meow");
        }

        public void die(boolean a, boolean b) { //method overloading
            System.out.println("the cat is dead: " + a + b);
        }
    }
}

To create a two dimensional array in Java, you have to specify the data type of items to be stored in the array, followed by two square brackets and the name of the array.

public String dayOfWeekToString() {
  return ("{ \"month\": " + this.month + ", " + "\"day\": " + this.day + ", " + "\"year\": " + this.year + ", "
        + "\"dayOfWeek\": " + this.dayOfWeek + " }");
}


public String toString() {
  return dayOfWeekToString();
}

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