Java error: Implicit super constructor is undefined for default constructor

Question

I have a some simple Java code that looks similar to this in its structure:

abstract public class BaseClass {
    String someString;
    public BaseClass(Str         


        

Answer 1

Another way is call super() with the required argument as a first statement in derived class constructor.

public class Sup {
    public Sup(String s) { ...}
}

public class Sub extends Sup {
    public Sub() { super("hello"); .. }
}