The document discusses method overriding in object-oriented programming, explaining how a subclass can override methods inherited from its superclass unless they are marked as final. It provides examples of class structures demonstrating both valid and invalid usages of method overriding. The content highlights the error that occurs when attempting to override a final method.

1. youtube:Zooming | https://github.com/Soba-Arjun/

2. youtube:Zooming | https://github.com/Soba-Arjun/
Overriding
 If a class inherits a method from its
superclass, then there is a chance to
override the method provided that
it is not marked final.
 In object-oriented terms, overriding
means to override the functionality
of an existing method.

3. youtube:Zooming | https://github.com/Soba-Arjun/
Overriding - Example
class Parent {
void show()
{
System.out.println("Parent");
}
}
// Inherited class
class Child extends Parent {
void show()
{
System.out.println("Child");
}
}
// Driver class
class Main {
public static void main(String[] args)
{
Parent obj1 = new Parent();
obj1.show();
Parent obj2 = new Child();
obj2.show();
}
}

4. youtube:Zooming | https://github.com/Soba-Arjun/
Overriding - Example
class Parent {
void show()
{
System.out.println("Parent");
}
}
// Inherited class
class Child extends Parent {
void disp()
{
System.out.println("Child");
}
}
// Driver class
class Main {
public static void main(String[] args)
{
Parent obj1 = new Child();
obj1.disp();
Child obj2 = new Child();
obj2.disp();
}
}
Error.
Because, obj1 cant access disp

5. youtube:Zooming | https://github.com/Soba-Arjun/
Overriding - Example
class Parent {
final void show()
{
System.out.println("Parent");
}
}
// Inherited class
class Child extends Parent {
void show()
{
System.out.println("Child");
}
}
// Driver class
class Main {
public static void main(String[] args)
{
Parent obj1 = new Parent();
obj1.show();
}
}
Error.
Final cant override