Best way to set a property in SoapUI and read from JUnit?

I have a TestCase from where I want to set a property that should then be extracted via the Java API in a JUnit test case. I followed the page that describes the integration between SoapUI and JUnit (http://www.soapui.org/test-automation/junit/junit-integration.html), but that page only describes how to provide property values to SoapUI.