Explain jar archives, JAVA Programming

Assignment Help:

Explain JAR Archives ?

HTTP 1.0 uses a separate connection for every request. When you're downloading several small files, the time required to set up and tear down the connections can be a significant fraction of the total amount of time needed to load a page. It would be better if you could load all the HTML documents, images, applets, and sounds a page required in one connection.

One way to do this without changing the HTTP protocol is to pack all those various files into a single archive file, perhaps a zip archive, and just download that.

We aren't quite there yet. Browsers do not yet understand archive files, other than applets do. You can pack all the images, sounds, and .class files an applet needs into one JAR archive and load which instead of the individual files. Applet classes do not have to be loaded directly. They can also be stored in JAR archives. To do this you use the ARCHIVES attribute of the APPLET tag
< applet code="HelloWorldApplet"
width="200" height="100"
archives="HelloWorld.jar">
< hr>
Hello World!
< hr>
< /applet>

In this example, the applet class is still HelloWorldApplet. Therefore, there is no HelloWorldApplet.class file to be downloaded. Instead the class is stored inside the archive file HelloWorld.jar.
Sun provides a tool for creating JAR archives with its JDK. For example,
$ jar cf HelloWorld.jar *.class

This puts all the .class files in the current directory in the file named "HelloWorld.jar". The syntax of the jar command is deliberately same to the Unix tar command.


Related Discussions:- Explain jar archives

What is mixing data types, What is Mixing Data Types? As well as mergin...

What is Mixing Data Types? As well as merging various operations, you can mix and match various numeric data types on the similar line. The program below uses both ints and dou

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

Swing, can we develop paint user can draw his charcters and images in swing...

can we develop paint user can draw his charcters and images in swing

Myfirstprogram in java, The purpose of this assignment is to help you learn...

The purpose of this assignment is to help you learn the Java environment and practice I/O instructions, assignment, and simple arithmetic operators. Teams: The assignment can

Automated the claim sub-system, Automated the claim sub-system: Insur...

Automated the claim sub-system: Insurance Domain:       CIA-MI   Type                                         Development - Web-based Application Role

What is the problem along with relational database, What is the problem alo...

What is the problem along with Relational Database and what solution you could suggest for it? When we store object orientated data within RDBMS it required to translate in to

Overloaded Methods, QUESTION 3: Overloaded methods Write the overloaded me...

QUESTION 3: Overloaded methods Write the overloaded method named average () for each of the following problems: a) The first method receives THREE (3) integer values and returns

Create a simple object based gui application, Objective: create a simple o...

Objective: create a simple object, put that object in a simple collection class, use that object and collection in a simple GUI application. Specification:  Consider a Librar

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