Because I am working on Windows, here is the Windows syntax—translate to your shell :. Creating a jar-file is not very difficult. But creating a startable jar-file needs more steps: create a manifest-file containing the start class, creating the target directory and archiving the files. After finishing the Java-only step we have to think about our build process. We have to compile our code, otherwise we couldn't start the program. Oh— start —yes, we could provide a target for that.
We should package our application. Now it's only one class—but if you want to provide a download, no one would download several hundreds files A startable jar file would be nice And it's a good practise to have a clean target, which deletes all the generated stuff. Many failures could be solved just by a "clean build". By default Ant uses build.
While having a look at the buildfile, we will see some similar steps between Ant and the Java-only commands:. Now that we have a working buildfile, we could do some enhancements: many times you are referencing the same directories, main-class and jar-name are hardcoded, and while invoking you have to remember the right order of build steps.
Somebody told us not to use System -statements. We use Log4J for that, because. We store our external libraries in a new directory lib.
Log4J can be downloaded [1] from Logging's Homepage. Create the lib directory and extract the log4j After that we have to modify our Java source file to use that library and our buildfile so that this library could be accessed during compilation and run. Working with Log4J is documented inside its manual. Active Oldest Votes.
Naor Bar Naor Bar 1, 18 18 silver badges 13 13 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Helping communities build their own LTE networks.
Podcast Making Agile work for data science. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Linked 1. Each resource of the collection will be run in a transaction of its own. Prior to Ant 1. Use a sort resource collection to get a predictable order of transactions. Sql 's classpath attribute is a path-like structure and can also be set via a nested classpath element. It is used to load the JDBC classes. Connect to the database given in url as the sa user using the org.
Ant properties in the nested text will not be expanded. For example:. The following command turns property expansion in nested text on it is off purely for backwards compatibility , then creates a new user in the HSQLDB database using Ant properties. The following connects to the database given in url as the sa user using the org. Output file for result sets. Since Ant 1. No; defaults to false , ignored if output does not specify a filesystem destination.
The classpath to use, given as a reference to a path defined elsewhere.
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