This class has only one method, walk. Next, we want to create a Bird class that also has a fly method. We do this using extends keyword:
class Bird extends Animal {
void fly() {
System.out.println("I am flying");
}
}
Finally, we can create a Bird object that can both fly and walk.
public class Solution{
public static void main(String[] args){
Bird bird = new Bird();
bird.walk();
bird.fly();
}
}
The above code will print:
I am walking
I am flying
This means that a Bird object has all the properties that an Animal object has, as well as some additional unique properties.
The code above is provided for you in your editor. You must add a sing method to the Bird class, then modify the main method accordingly so that the code prints the following lines:
I am walking
I am flying
I am singing
in java code
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();
}
}
To add the `sing` method to the `Bird` class and modify the `main` method to print the desired lines, you can update the existing code as follows:
```java
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();
}
}
```
By adding the `sing` method to the `Bird` class, we can now call `bird.sing()` in the `main` method to print "I am singing" in addition to the existing "I am walking" and "I am flying" lines.
To add a `sing` method to the Bird class, you can simply define a new method in the Bird class that prints out "I am singing". Here's the modified code:
```java
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();
}
}
```
In the above code, the `sing` method is added to the Bird class. Then, in the `main` method of the `Solution` class, the `sing` method is called on the `bird` object. This will print the following lines:
```
I am walking
I am flying
I am singing
```
By extending the Animal class and adding a new method to the Bird class, we have successfully modified the code to print the required lines.