Java Inheritance error: Implicit Super Constructor is undefined

Question

I am a novice to Java and just learning OOP concepts. Please review my code. I am getting the following error.- Implicit Super Constructor is undefined.

Answer 1

You are receiving this error because BoxSuper does not have a no-arg constructor. During your constructor call in BoxSub, if you do not define the super constructor call Java tries to automatically call the no-arg super() constructor.

Either define a super constructor call in BoxSuper like so:

class BoxSub extends BoxSuper
{
    int weight;
    BoxSub(int a,int b,int c,int d)
    {
        super(a, b, c);
        weight=d;
    }
}

or define a no-arg constructor in BoxSuper:

class BoxSuper
{
    int height;
    int length;
    int width;

    BoxSuper(){}
...