Try This Improve the Queue class

You can use the private modifier to make an important improvement to the Queue class developed in the Try This 5-2 section of Chapter 5. In that version, all members of the Queue class use the default access, which is
basically public. In other words, it would be possible for a program that used Queue to directly access the underlying array, possibly accessing its elements out of order. Since the point of a queue is to provide a “first in, first out” list, it is not desirable to allow access out of order. Also
It would be possible for a malicious programmer to change the values ​​stored in the putloc and getloc indexes, thus tampering with the queue. Fortunately, these types of problems are easy to avoid by applying the private.

specifier

Objective:
Improve the Queue class from the "Try This 5-2" section by applying the private access modifier to protect the internal members of the class.

Steps for Improvement:
Copy the Original Class
Copy the original Queue class from the "Try This 5-2" section to a new file called Queue.java.

Apply private Modifier:
Add the private modifier to the internal members of the Queue class:

• The array q, which stores the elements of the queue.
• The putloc and getloc indexes, which manage insertion and removal operations in the queue.

The above is the detailed content of Try This Improve the Queue class. For more information, please follow other related articles on the PHP Chinese website!