Well. This is partly correct.
If you do not call the parent class constructor explicitly
java automatically calls the 'no argument' constructor of the parent class, if the parent class has one. This is done in the begining of the child constructor.
If you want to call the constructor with some argument(s), then it has to be done explicitly, using super(). And should be the first statement in the child constructor.
Hope this helps.
Kaustubh.