OOP principles - Animal example

Animal.java

package main;

public abstract class Animal {
	public abstract void eat();

	public abstract void sleep();

	private String colour;
	private int noOfLegs;

	public String getColour() {
		return colour;
	}

	public void setColour(String colour) {
		this.colour = colour;
	}

	public int getNoOfLegs() {
		return noOfLegs;
	}

	public void setNoOfLegs(int noOfLegs) {
		this.noOfLegs = noOfLegs;
	}

}

App.java

package main;

public class App {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Reptile george = new Basilisk();
		george.sleep();
		System.out.println(george.getColour());
	}

}

Basilisk.java

package main;

public class Basilisk extends Reptile {

	public Basilisk() {
		this.setColour("green");
	}

	@Override
	public void eat() {
		// eat
	}

	@Override
	public void sleep() {
		System.out.println("zzzzzzz");

	}
@Override
public String getColour() {
	System.out.println(super.getColour());
	return "beige";
}
}

Reptile.java

package main;

public abstract class Reptile extends Animal {

	private boolean hasScales = true;
	
	private boolean coldBlooded = true;

	public boolean isHasScales() {
		return hasScales;
	}

	public void setHasScales(boolean hasScales) {
		this.hasScales = hasScales;
	}

	public boolean isColdBlooded() {
		return coldBlooded;
	}

	public void setColdBlooded(boolean coldBlooded) {
		this.coldBlooded = coldBlooded;
	}
	@Override
	public void sleep() {
		System.out.println("Snore");
	}
}