This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
There is no such equivalent. A Struts <html:radio> tag is tied to the ActionForm bean property specified in the tag. If the ActionForm property is set to the value specified in the tag, the button will show as checked. Otherwise, it will show as unchecked. Example:
In the above example, if the form bean property "color" contains "blue, the second button will be checked.