I am writing a test system in Java.

According to my current design, True/False question is a sub class of
multiple choice question.

I have a problem here:

Multiple choice's constructor looks like this:

public multipleChoiceQuestion(boolean isQuiz)
{
 choice=new choices();
 setChoicesDone=false;
 answer=new answers();
 System.out.print("You have choosen to enter an multiple choice
question.Please enter the question below.\nPlease type here:>");
}

True False's like this:

public trueFalseQuestion(boolean isQuiz)
{
 super(isQuiz);
 choice=new choices("True", "False");
System.out.print("You have choosen to enter an true false question.Please
enter the question below.\nPlease type here:>");
}

The problem is that when the true false question is initalized the two print
out all show on the screen like this:

You have choosen to enter an multiple choice question.Please enter the
question below.
Please type here:>You have choosen to enter an true false question.Please
enter the question below.
Please type here:>

How can I disable the first one for multiple choice? Perhap I can let the
super() redirected to NULL?