Java

class Top {
   void doSomething() {
     // something is done
   }
}

interface First {
   void goFirst();
}

interface Last{
   void goLast();
}

class Bottom
      extend Top
      implement First,
            Second {

   void doSomething() {
     this.goFirst();
     super.doSomething();
     this.goLast();
   }

   void goFirst() {
      // the first bit;
   }
   void goLast() {
      // the last bit;
   }
   
}

interface Dog
{
	public void bark();
}

interface Cat
{
	public void meow();
}

class DogCat implements Dog,Cat
{
	public void bark()
	{
		System.out.println("Barking");
	}

	public void meow()
	{
		System.out.println("Meowww");
	}
}

public class Hybrid extends DogCat
{
	public static void main(String[] args)
	{
		Hybrid r =new Hybrid();
		r.bark();
		r.meow();
	}

}