Positive Sides Of An Address Book Software

By Marissa Velazquez

Technology has come with many gains. One of such gains comes from the use of different applications. In turn, individuals are able to process information within a short time. With the quick processing, comes efficiency in terms of storing and retrieving certain information or data. This capability of accessing information within a short time without having to go through files is possible through using an address book software.

It goes without mention that keeping client records in files is cumbersome and bulky at the same time. It wastes a lot of space and does not present the effectiveness that clients want. While it may take a long time to retrieve a given information from physical file, the same process only takes seconds to do so while using a relevant application like the one above.

With the use of the above programs, businesses and people will be able to keep track of important dates that involve their clients. In order to make it effective, the different programs have reminders that one can set in order to give a notification hours or days before the exact date. This step means that it is not possible for one to forget about important appointments and meetings.

The availability of different features in the programs mentioned above is a good thing. Not only does it allow users to perform different tasks, but also customize them the way they want. The customized version is always interesting to use. It gives a user the feeling of being in control of the system. Some of the common features that people want to include are file attachments and tables.

If you want your business to remain competitive given the entrance of many firms into the business sector, you will have to use the application mentioned in this piece of work. Such a program presents very many plus sides that one cannot compare with the old way of keeping customer and client details in files. The use of files can cause delays when looking for a given detail.

It is usually effective to have the details of a given person under one contact name. The most common type of such information include the phone number, postal and email addresses of clients. This feature makes it easy to communicate with the people you want using different channels without the need to go looking for such details from different locations.

The other gain that a user stands to gain while using the application above is that it can handle as many contacts as possible. One will not need to look for another application to store the ever-growing number of contacts when the business expands. This is a good thing since all the contacts will remain in one location despite their large number.

It will be unfair if one compares the use of files in storing client details and the use of the latest address book software. The latter is far much better than the former. It is fast and effective in all ways. One does not spend too much time looking for a particular detail.

About the Author:

You can visit the website www.elwoodsoftware.com for more helpful information about Merits Of Address Book Software

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Setting an Applications Entry Point

If you have an application bundled in a JAR file, you need some way to indicate which class within the JAR file is your applications entry point. You provide this information with the Main-Class header in the manifest, which has the general form:

Main-Class: classname

The value classname is the name of the class that is your applications entry point.
Recall that the entry point is a class having a method with signature public static void main(String[] args).
After you have set the Main-Class header in the manifest, you then run the JAR file using the following form of the java command:

java -jar JAR-name

The main method of the class specified in the Main-Class header is executed.

An Example

We want to execute the main method in the class MyClass in the package MyPackage when we run the JAR file.
We first create a text file named Manifest.txt with the following contents:

Main-Class: MyPackage.MyClass

---

Warning: The text file must end with a new line or carriage return. The last line will not be parsed properly if it does not end with a new line or carriage return.

---

We then create a JAR file named MyJar.jar by entering the following command:

jar cfm MyJar.jar Manifest.txt MyPackage/*.class

This creates the JAR file with a manifest with the following contents:

Manifest-Version: 1.0
Created-By: 1.6.0 (Sun Microsystems Inc.)
Main-Class: MyPackage.MyClass

When you run the JAR file with the following command, the main method of MyClass executes:

java -jar MyJar.jar

Setting an Entry Point with the JAR Tool

The e flag (for entrypoint), introduced in JDK 6, creates or overrides the manifests Main-Class attribute. It can be used while creating or updating a jar file. Use it to specify the application entry point without editing or creating the manifest file.
For example, this command creates app.jar where the Main-Class attribute value in the manifest is set to MyApp:

jar cfe app.jar MyApp MyApp.class

You can directly invoke this application by running the following command:

java -jar app.jar

If the entrypoint class name is in a package it may use a . (dot) character as the delimiter. For example, if Main.class is in a package called foo the entry point can be specified in the following ways:

jar cfe Main.jar foo.Main foo/Main.class

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