XML by Example

Java Archive (JAR) files were introduced to solve this problem. A JAR file

groups all the classes in an application and it ensures that the paths are

also preserved.

Internally, JAR files are zip files so you can create them with WinZIP or

another zip tool. In practice, however, it is easier to use the JAR application

included in the JDK.

You create a JAR file with the following command:

jar cvf xdic.jar com\psol\xdic\XDic.class

If everything goes well, this command creates a new file xdir.jar. You can

use this file in a classpath instead of your application directory, as in

set classpath=c:\jetty\lib\javax.servlet.jar;

➥c:\jetty\lib\com.mortbay.Jetty.jar;xdir.jar ...