Constructors during Inheritance

class Child extends Parent {

	int a = 0;	

	Child( this.a, int parentVal ) : super( parentVal ) {
		// code
	}
	
}

Named constructor method

class Child extends Parent {

	int a = 0;	

	Child.namedCon( this.a, int parentVal ) : super.namedCon( parentVal ) {
		// code
	}
	
}