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

Functions in javascript, The following set of short questions will focus on...

The following set of short questions will focus on getting you familiar with JavaScript functions. All functions and testing should appear in a single XHTML 1.0 Strict page. All

Define testing with respect to programming, Define testing with respect to ...

Define testing with respect to programming? Testing is the process through that we try to determine the presence defects in a program. Testing is an significant step in soft

Difference between a stringbuffer and a string class?, String is immutabl...

String is immutable in java : you can't change a string object but can replace it by creating a new object instance. Creating a new instance is rather expensive.   //Non ef

Explain about class in java, In Java everything exists within a class. It d...

In Java everything exists within a class. It describes the behavior of the class and its characteristics. Java applications and applets are built in the class. Rules present for cl

What are checked and unchecked exception, What are Checked and UnChecked Ex...

What are Checked and UnChecked Exception? A checked exception is some subclass of Exception (or Exception itself), excluding class RuntimeException and its subclasses. Making a

Defiine the term object, Defiine the term Object ? Object is a named co...

Defiine the term Object ? Object is a named collection of properties (data, state) & techniques (instructions, behavior). Mainly Objects are key to understanding object-oriente

Constractar, Create a class HourlyWorker mind: particularHourlyWorker emplo...

Create a class HourlyWorker mind: particularHourlyWorker employee. • Declare two data members named wage and hours of double type with private access. • Implement a parameterized c

Develop a java application, Project Description: Modules of software: ...

Project Description: Modules of software: 1 - Serial RS232 comm port comunication 2 - NanoHTTPD serving some processed pages 3 - System tray application to indicate sta

Equation tool, i need help i hav done the gui part of my project and some s...

i need help i hav done the gui part of my project and some simple symbols but to display some complex symbols like integration and all but it shud be clear with lower and upper lim

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