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

What are the list interface and its main implementation, What are the List ...

What are the List interface and its main implementation? List helps in collections of objects. Lists may include duplicate elements. Main implementations of List interface are

Explain arithmetic promotion and binary operations, Explain Arithmetic Prom...

Explain Arithmetic Promotion and Binary Operations? An int divided through an int is an int, and a double divided by a double is a double, but what about an int divided by a do

Thread, what is join in java Thread

what is join in java Thread

What is jdbc exactly, What is JDBC exactly? Describe the steps required to ...

What is JDBC exactly? Describe the steps required to execute a SQL query using JDBC.

What is meant by semantic error, What is meant by semantic error? Occur...

What is meant by semantic error? Occur while a statement executes and has an effect not intended through the programmer and Frequently times occur only in unusual & infrequent

Want a graph database for relationship mapping of entities, Want a graph da...

Want a graph database for relationship mapping of entities Project Description: I want a graph database for relationship mapping of entities, liable peoples. Also, the databa

I need java expert with tomcat tuning experience, I need Java expert with t...

I need Java expert with tomcat tuning experience Project Description: Require a Java expert to fix memory issues with tomcat. Skills required: Java, Apache

I need android kiosk mode, I need Android Kiosk Mode Project Description...

I need Android Kiosk Mode Project Description: I need an Android platform developer to develop an app when device start it start into kiosk mode. Only browser window open a c

Implement design in the java programming language, Implement your design in...

Implement your design in the Java programming language. Your main program file must be called MIPSim.java. Your simulator should implement the MIPS instruction set with the rest

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