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EduardoCobian Q 29

Tracy Woo
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Joined: Jul 23, 2002
Posts: 113

Which statements are correct regarding the following jsp lines that use a tag library?
<%! Vectot vector =new java.util.Vector();%>
<% vector.addElement(“one” ; vector.addElement(“two” ; %>
<prefix:suffix attr='vector' />
1) A vector can't be assigned to a tag handler attribute
2) The program will compile and assign the vector's content to the attribute attr.
3) The program will assign the content of vector if assigment is: attr='<%= vector %>'
4) Microsoft is the worst software company in history.

The given answer is 3. But I am unable to understand what is meant by "the content of vector".
Can somebody please explain?
Kyle Tang
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Joined: Aug 22, 2002
Posts: 78
attr="vector" means, the string literal "vector" is assigned to that attr. in this case, attr has type String.
attr="<%=vector%> means, attr has type Vector, and it is assigned value vector. In this case, I guess you need to explicitly define the type for attr, in the tld file.
content of the vector means, the real Vector object, not just the String "vector".
Kyle


Kyle Tang<br />SCJP 91<br />SCWCD 96<br />SCBCD 95
Bruce Jin
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Joined: Sep 20, 2001
Posts: 666
I feel this question is unclear.
<prefix:suffix attr='vector' /> means a string ‘vector’ is assigned to attr. I think this is OK.
I think 1) is true: A vector can't be assigned to a tag handler attribute.
I hope some one can clear this up since I am not very sure about this.
Thanks


BJ - SCJP and SCWCD
We love Java programming. It is contagious, very cool, and lot of fun. - Peter Coad, Java Design

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Tauqueer Ali
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Joined: Sep 05, 2001
Posts: 53
I faced a very similar question in actual SCWCD exam.


SCJP2, SCWCD, XML, OOAD<br />Kolkata, India
Peter den Haan
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Joined: Apr 20, 2000
Posts: 3252
The JSP fragmentwill translate to (among other things) the statementwhere "tag" is a variable referring to the tag object, and "expr" can be any Java expression or variable (including a Java primitive). Of course, if the tag does not have a setAttr() method taking an appropriate argument type, the compiler will complain.
Still a bad question because I feel that 3. and 4. are equally correct
- Peter
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: EduardoCobian Q 29
 
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