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javaoopsolid-principlesoverriding

Overriding without calling parent method, violating Liskov Principle

I am developing a simple project. And I have a conflict with meaning of Liskov Principle in my project.

I simplified my question of my project with this example: 

public class Animal {  

     public void feed() {     

         // do something here         
     }    
}    


public class Dog extends Animal {

    // some methods and attributes

    @Override
    public void feed() {   

        // never call parent feed() method (super.feed())
    }
}

So, my question is, if I don't call parent method and write a completely new codes in override method, Is this violates Liskov Principle?

thanks.

Solution

  • No, it will not violate the Liskov Principle as long as the subclass' implementation satisfies the expectations of the base class.