Struts - Multiple Selection

[pamnanipayal]

Please Help.
I want to mark multiple values in a list box as SELECTED.
in tag <html:select> the attribute value is a String. I can't even pass the String array, as it says type mismatch.
Please let me know what to pass for value in the following tag

<html:select property=&quot;serviceType&quot; size=&quot;3&quot; multiple=&quot;true&quot; value=&quot;<%=str3[0]%>&quot;>

Above tag marks the first element in String[] str3 as selected.
It throws error if i pass str3 as the value.

Please help me out. It is very very urgent.