Quiz





Quiz

To determine what kind of knowledge you inherited from the past hour's work, answer the following questions.

Questions

1:

If a superclass handles a method in a way you don't want to use in the subclass, what can you do?

  1. Delete the method in the superclass.

  2. Override the method in the subclass.

  3. Write a nasty letter to the editor of the San Jose Mercury News hoping that Java's developers will read it.

2:

What methods can be used to retrieve an element stored in a vector?

  1. get()

  2. read()

  3. elementAt()

3:

What statement can you use to refer to the methods and variables of the current object?

  1. this

  2. that

  3. theOther

Answers

A1:

b. Because you can override the method, you don't have to change any aspect of the superclass or the way it works.

A2:

a. The get() method has one argument, the index number of the element.

A3:

a. The this keyword refers to the object in which it appears.


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