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Create a Package - .jar File


A package is a group of classes in the same directory. To construct a package:-
  1. Chose a name for the package, for example myPackage.
     
  2. Create a directory called myPackage.
     
  3. Place the .java files into the directory.
     
  4. Edit each .java file so that the first line reads:-
     
            package myPackage
     
  5. Compile all the files in the directory.
     
  6. Create a .jar file of your package as outlined in the following instructions.
     
  7. Open a DOS box and change to the directory above myPackage.
     
  8. Type in the following command to create a file called myPackage.jar:-
     
            jar cf myPackage.jar myPackage
     
  9. Copy myPackage.jar into your Java library:-
     
            c:\ {java version} \jre\lib\ext\
     
            e.g. c:\jdk1.4\jre\lib\ext\
     
  10. You can now use the classes in the package anywhere on your computer by importing the package:
     
            Import myPackage.*;

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