Question

I have two constructors

MyObj(String s){ //first constructor
    ...
    if(s==null) s = somecode;
            this.s = s;
    ...
}

MyObj(): this(null) { } //second constructor

In this way, if the empty constructor is called, it will redirect to the first constructor and initialise the value as determined by some code.

However, now I have a third constructor

MyObj(Stream st){ //third constructor
    ...
}

Now the second constructor has no idea whether it is supposed to call the first constructor or the third. How do I tell it to call the first constructor? I tried MyObj(): this(String s = null) and it doesn’t work either.

Answer 1

Maybe: MyObj(): this((string) null) {}?