Creating JAR files for Java routines

A convenient way to ensure that all modules of a Java routine are accessible is to store those modules in a JAR file. You create the JAR file by running the jar command in z/OS® UNIX System Services.

1. If the Java source file does not contain a package statement, change to the directory that contains the class file for the Java routine, which you created by running the javac command.

   For example, if JDBC routine Add_customer.java is in /u/db2res3/acmejos, change to directory /u/db2res3/acmejos.

   If the Java source file contains a package statement, change to the directory that is one level above the directory that is named in the package statement.

   For example, suppose the package statement is:

   package lvlOne.lvlTwo.lvlThree; 

   Change to the directory that contains lvlOne as an immediate subdirectory.
2. Run the jar command.
   You might need to specify at least these options:

   c

   Creates a new or empty archive.

   v

   Generates verbose output on stderr.

   f

   Specifies that the argument immediately after the options list is the name of the JAR file to be created.

   For example, to create a JAR file named acmejos.jar from Add_customer.class, which is in package acmejos, execute this jar command:

   jar -cvf acmejos.jar acmejos/Add_customer.class

   To create a JAR file for an SQLJ routine, you also need to include all generated class files, such as classes that are generated for iterators, and all serialized profile files. For example, suppose that all classes are declared to be in package acmejos, and all class files, including generated class files, and all serialized profile files for SQLJ routine Add_customer.sqlj are in directory /u/db2res3/acmejos/. To create a JAR file named acmejos.jar, change the the /u/db2res3 directory, and then issue this jar command:

   jar -cvf acmejos.jar acmejos/*.class acmejos/*.ser