Question

I have abstract class and interface like this

abstract class ParentClass
{
    int VALUE;
    public abstract void display();
    public void display2()
    {
        System.out.println("this is abstract class method");
    }
}

interface parentInterface
{
    int VALUE=88;
    abstract void display();
    void display2();
}

the child class extends and implements the above like following

class ChildClass extends ParentClass implements parentInterface
{

    ChildClass()
    {
        super.VALUE=0;
        //VALUE=0;     //<=will give ambiguous property
    }
    @Override
    public void display() 
    {
        System.out.println("Current Class-"+this.getClass());
        System.out.println("Integer value-"+super.VALUE);
    }
    public void display2()
    {
        //to call the method of abstract class 
        //call by using super.display2();
        System.out.println("this is implemented method");
    }
}

So, my question is How can i access interface VALUE variable in ChildClass ??

Answer 1

You can access the VALUE from interface using parentInterface.VALUE as variables in interfaces are public static final by default.

And the abstract class’s VALUE can be accessed using this.VALUE as it is a member variable.