One easy way is to use a logging properties file, by including this VM argument:
where “logging.properties” is the path to a file containing logging configuration. For relative paths, the working directory of the process is significant.
In that file, include a line like this:
This sets the global level, which can be overridden for specific handlers and loggers. For example, a specific logger’s level can be overridden like this:
com.xyz.foo.level = SEVERE
You can get a template for a logging properties file from jre6\lib\logging.properties.