Explain the term naming packages in details, JAVA Programming

Assignment Help:

Explain the term Naming Packages in details?

As you saw previously name space conflicts arise if two pieces of code declare the similar name. Java remains track of what belongs to each package internally. Therefore if Sun decides to put a Website class in java.lang in Java 2.0, it won't conflict along with a Website class described in an http package. Since they're in different packages Java can tell them apart. Just as you tell John Smith apart from John Jones through their last names, so too does Java tell two Website classes apart through their package names.

Therefore this scheme breaks down if two different classes share the same package name as well as class name. In a world in that several different packages can be downloaded from many different sites, all landing in the user's CLASSPATH, it's not unthinkable in which two different people might write packages known as http with a class called Website.

To ensure that package names don't conflict along with each other, Sun asks that you prefix all your packages with a reversed domain name. Therefore if your domain name is poly.edu, your package names should starts along with edu.poly. Within that domain you are responsible for making sure in which no one else writes a package that conflicts with yours.

This is primarily of interest to applet writers, not applet users. If you're surfing the net and you load one applet from MIT in which has a http.Website class and another from Polytechnic that has a various http.Website class, Java can still tell them apart since before it runs any package it downloads off the net it prefixes everything along with the site from which it got it. Instead it sees edu.poly.www.http.Website and edu.mit.www.http.Website. It's only while you download a package manually and install it in one directory in your CLASSPATH and install another package elsewhere in your CLASSPATH in which real name conflicts can arise if packages aren't carefully prefixed with a domain or email address.


Related Discussions:- Explain the term naming packages in details

State in detail about java virtual machine, State in detail about Java Virt...

State in detail about Java Virtual Machine (JVM) Central part of java platform is java virtual machine Java bytecode executes by special software known as a "virtual machine

Rmi client program, In a RMI Client Program, what are the excpetions which ...

In a RMI Client Program, what are the excpetions which may have to handled Ans) a. MalFormedURLException b. NotBoundException c. RemoteException

Write program for queue of cards, A Queue of Cards You are going to par...

A Queue of Cards You are going to parallel the development done in the lesson on inheritance where we constructed some base classes, StackNode and Stack, and derived  Floa

Explain data entry issues, Explain data entry issues? DATA ENTRY: The...

Explain data entry issues? DATA ENTRY: There is new data entered every day. New customers are added every day. Some of the data entry needs the manual entry within computer s

Student, what are Objects and Fields in java

what are Objects and Fields in java

Javascript validation, Javascript validation, JAVA Programming 1. Obtaining...

Javascript validation, JAVA Programming 1. Obtaining the new script: Download and save the attached comment CGI mailer script form-mail2.pl to your server''s cgi-bin directory, and

State the verify phase of java program development, State the Verify phase ...

State the Verify phase of Java Program Development Before the bytecodes in an application are executed by the java interpreter, they are verified by the bytecode verifier in

JAVA Cipher Program, Cryptography, the study of secret writing, has been ar...

Cryptography, the study of secret writing, has been around for a very long time, from simplistic techniques to sophisticated mathematical techniques. No matter what the form howeve

Tictactoe, write complete application to play game tictactoe

write complete application to play game tictactoe

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd