What is different? setProperty works, c:set does not ???

Question

I have a class that I am instantiating twice (separate instances... i.e. using different scopes) in a jsp page. In the second instance I tried to set three properties using c:set, target, and property. It gave me an error saying the last property did not have a setter method... but it does. So then I tried using 'setProperty' instead, and it worked fine. Can someone take a look and tell me what the difference is?
This worked fine:
<jsp:useBean id="arrayOfArticles" scope="session" class="com.mystuff.blogger.beans.GetArticleBean">
<jsp:setProperty name="arrayOfArticles" property="upperBound" value="0" />
<jsp:setProperty name="arrayOfArticles" property="range" value="10" />
<jsp:setProperty name="arrayOfArticles" property="articleArray" />
</jsp:useBean>
For some reason this did not work:
<jsp:useBean id="arrayOfArticles" scope="session" class="com.mystuff.blogger.beans.GetArticleBean" />
<c:set target="${arrayOfArticles}" property="upperBound" value="0" />
<c:set target="${arrayOfArticles}" property="range" value="10" />
<c:set target="${arrayOfArticles}" property="articleArray" />
It kept giving an error like this (from Tomcat 5.0.19):
javax.servlet.ServletException: No setter method in <set> for property "articleArray"
Thanks,
BillR

Answer 1

a c:set represents a Set Collection I think?Nope. It is JSTL tag used fro setting properties and variables
So it doesn't "set" something, it represents a set of
values. See J2SE 1.4 API on Collection,Set, HashSet,
TreeSet, ...Generally his use is correct.
<c:set target="${arrayOfArticles} property="articleArray" value="someValue"/>
But he has to make sure
1) the arrayOfArticles bean has a method called setArticleArray(...)
2) that the method takes a parameter of some type
3) that there is a value provided that can be converted to the same type needed by the set method
canucklehead, I know I answered in your other thread, but another idea would be to create a 'dummy' value in the setArticleArray method. Sorta like this:
//doit is a dummy boolean, used just to get this method called
public void setArticleArray(boolean doit) {
  this.articleArray = new ReturnArticle().getRangeOfArticles(upperBound, range);
} Then you could use it in JSTL like this:
<jsp:useBean id="arrayOfArticles" scope="session" class="com.mystuff.blogger.beans.GetArticleBean" />
<c:set target="${arrayOfArticles}" property="upperBound" value="0" />
<c:set target="${arrayOfArticles}" property="range" value="10" />
<c:set target="${arrayOfArticles}" property="articleArray" value="true"/>