Hi bhavana,
It would be better, if you posted your code for us to troubleshoot, as it does not appear, what you are saying could happen.
Java always calls the parent class constructor automatically whenever the child class constructor is executed. If the parent class does not have a explicitly defined constructor, a default constructor is created by Java.
If there is one or more (overloaded) explicitly defined constructor ( it may be a no-parameter constructor or a parameterized constructor), you will have to explicitly call the parent class constructor using -
super();
or
super( arg1, .....);