"for each..." statement

Question

I just wonder if java support "for each" statement? such as, I don't know how many items and names in a array, so I like to list out all. then how to do it?
for example, in asp:
'----------codes start-----------
for each item in session.contents
response.write item &"="& session(item)
next
'-----------codes----------------
how can I change this code to Java, so I can get each session name?
thank you

Answer 1

hi, i don't know if you have had answer to your problem allready, so i provide you with some manual pagess that wil be helpful.
...i don't know if you have found your way to J2EE APi allready...
HTTPSession:
http://java.sun.com/j2ee/1.4/docs/api/javax/servlet/http/HttpSession.html
and there you will find method getAttributeNames(), from there you may work with while(attribNamesEnumeration.hasNext()) { ... }
but as you ask something that might as well be from PHP, then i suspect that you're dealing with JSPs, and therefore you could be wanting help not about session, but HttpServletRequest:
http://java.sun.com/j2ee/1.4/docs/api/javax/servlet/http/HttpServletRequest.html
and there you see methods (not directly in this class, but in its superclass -- sorry if that's confusing, important thing is taht you may use those methods) like:
getParameter(String name)
getParameterMap()
getParameterNames()
getParameterValues(String name)
there's no point in copying that api here.... so go check it out yourself...
put basicaly you may use getParameterNames() to get all names of parameters that are sent with this request, and in case any of parameters has many values (like.in.this/request.html?param=value1&param=value2&param=value3) you could use getParameterValues() method to get all values of that parameter
HTH