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javainheritancesuperclass

Call 'grand' parent function from child class in multi-level inheritance

public class GrandParent
{
    public void walk()
    {
        ...
    }
}

public class Parent
{
    public void walk()
    {
        ...
    }
}

public class Child
{
    public void walk()
    {
        // Here in some cases I want to use walk method of GrandParent class
    }
}

Now in Child.walk(), I want to use GrandParent.walk() only in some cases. How can I do that? Since super.walk() will always use Parent.walk().

NOTE: (Please note that this is simplified example of a complex scenario)

NOTE2: Please only tell if there is a standard procedure of doing that. I have used a flag in parent class, which the child sets if it wants to use the method of GrandParent. But this sequence becomes very complex.

Solution

  • You could specify method for accessing parent's value like this:

    public class GrandParent
{
    public void walk()
    {
        ...
    }
}

public class Parent
{
    public void walk()
    {
        ...
    }

    public void grandParentWalk()
    {
        super.walk();
    }
}

public class Child
{
    public void walk()
    {
        grandParentWalk();
    }
}

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