Although Jalopy ships with sensible default settings (mimicking the Sun Java coding convention), you most likely want to configure the formatter to match your needs (adding copyright headers, tune Javadoc handling and the like). For such, Jalopy comes with a graphical configuration tool that lets you interactively customize the settings. See Chapter 2, Configuration for an in-depth discussion of the available options.
To display the configuration tool, you should use the matching wrapper script for your platform. The wrapper scripts are called jalopy.xxx.
Invoke the script with the --configure option.
jalopy --configure
Or you can execute the Jar with
java -jar jalopy-Help.jar --configure
Of course, you can setup the classpath yourself by adding the jalopy-Help.jar file as usual and then type
java Jalopy --configure