//Bird.java
              abstract class Bird {
              public abstract void fly();
              
              public abstract void makeSound();
              }
              //Eagle.java
              class Eagle extends Bird {
              @Override
              public void fly() {
              System.out.println("Eagle: Flying high in the sky.");
              }
              
              @Override
              public void makeSound() {
              System.out.println("Eagle: Screech! Screech!");
              }
              }
              //Hawk.java
              class Hawk extends Bird {
              @Override
              public void fly() {
              System.out.println("Hawk: Soaring through the air.");
              }
              
              @Override
              public void makeSound() {
              System.out.println("Hawk: Caw! Caw!");
              }
              }
              //Main.java
              class Inheritance_25 {
              public static void main(String[] args) {
              Bird eagle = new Eagle();
              Bird hawk = new Hawk();
              
              eagle.fly();
              eagle.makeSound();
              
              hawk.fly();
              hawk.makeSound();
              }
              }