Method Overriding in Java

Method Overriding in Java is a feature that allows a subclass to provide a specific implementation of a method that is already provided by its parent class. The method in the subclass must have the same name, return type, and parameters as the method in the parent class.

Here are the steps to override a method in Java:

1. Inheritance: In order to override a method, the class must inherit from another class.

public class ParentClass {
    public void display() {
        System.out.println("This is the parent class");
    }
}

2. Create Subclass: Create a subclass that extends the parent class.

public class ChildClass extends ParentClass {
}

3. Override Method: In the subclass, override the method from the parent class. The method must have the same name, return type, and parameters.

public class ChildClass extends ParentClass {
    @Override
    public void display() {
        System.out.println("This is the child class");
    }
}

In the above example, the display() method in ChildClass is overriding the display() method in ParentClass.

4. Use Overridden Method: Now, when you create an object of the ChildClass and call the display() method, the overridden method in ChildClass will be called, not the one in ParentClass.

public class Main {
    public static void main(String[] args) {
        ChildClass cc = new ChildClass();
        cc.display();  // Outputs: This is the child class
    }
}

This is the basic concept of method overriding in Java. It is used for runtime polymorphism and to provide the specific implementation of the method.