To organize the internationalization program into three packages, you could create the following three directories and move the listed source files into them:Įach *.java file needs a package delcaration at the top that reflects the name of the directory. Although these three sets of classes are related to each other, they have different functions and are to be deployed separately. All you do is put related class files in the same directory, give the directory a name that relates to the purpose of the classes, and add a line to the top of each class file that declares the package name, which is the same as the directory name where they reside.įor example, the class and other related files for the program files from Part 2, Lesson 6: Internationalization can be divided into three groups of files: fruit order client, view order client, and server files. It is easy to organize class files into packages.

Change Client Code to Find the Properties File.

Normally, you would use packages from the beginning of development. This lesson shows you how to organize the program files from Part 2, Lesson 6: Internationalization into packages and deploy the executable and other related files to production using JAR file format. JAR file format is a compression and file packaging format and tool for bundling executable files with any other related application files so they can be deployed as one unit. When your application is fully tested, debugged, and ready for deployment, use the Java Archive file format to deploy the application.

Packages make it easier to locate and use the class files and help you control access to class data at run time.

A package is a convenient way to organize groups of related classes, and in development, you should organize your application files into packages too. Until now, you have used classes from the Java API library by importing the package containing the class or classes you need.

Download weka jar file for import