Java Inheritance I Hakerrank Solution For Explanation Watch Video: import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; class Animal{ void walk(){ System.out.println( "I am walking" ); } } class Bird extends Animal{ void fly(){ System.out.println( "I am flying" ); } void sing(){ System.out.println("I am singing"); } } public class Solution{ public static void main(String args[]){ Bird bird = new Bird(); bird.walk(); bird.fly(); bird.sing(); } }