Which of the following are correct JSP useBean declarations?

[Firas Zuriekat]

 
1      <jsp:useBean id="softDrink" beanName="Drink.ser" type="com.baboon.interface.Drink" />   
2      <jsp:useBean id="softDrink" beanName="Drink.ser" class="com.baboon.interface.Drink" />   
3      <jsp:useBean id="card" class="com.baboon.cardgame.Card" />   
4      <jsp:useBean beanName="instructor" class="com.baboon.users.Instructor" />   
5      <jsp:useBean id="iDevice" type="com.baboon.types.Device" /> 
6      <jsp:useBean id="iDevice" type="com.baboon.types.Device" class="com.baboon.interface.Drink"  beanName="Drink.ser"  /> 

Correct Ans: 1,3 5

Q1) Why is 1 correct?

It should be incorrect because the Head First book doesn't discuss beanName atttribute and when it's not discussed, it's usually the wrong answer. But here 1 is correct. I thought beanName is syntax error.

Q2) What combinations of useBean, class, type are acceptable in <jsp:useBean...> tag?

[prashanth kumar]

Originally posted by Firas Zuriekat:


Correct Ans: 1,3 5

Q1) Why is 1 correct?

It should be incorrect because the Head First book doesn't discuss beanName atttribute and when it's not discussed, it's usually the wrong answer. But here 1 is correct. I thought beanName is syntax error.
>>HeadFirst discusses only stuff which is there in exam.And also in final >>exam,you can expect max of 3-4 questions outside headfirst though it can be less than that.
>>If you are going for 100%,you need to go through specs.


Q2) What combinations of useBean, class, type are acceptable in <jsp:useBean...> tag?

>>http://java.sun.com/products/jsp/syntax/1.2/syntaxref1217.html

[Firas Zuriekat]

It's great to know only 4 or less questions are outside the HF book. I relied completely on that very intuitive book. Compare to this from SUN:

    
<jsp:useBean id="beanInstanceName"
   scope="page|request|session|application"
{
   class="package.class" [ type="package.class" ]|
   beanName="{package.class | <%= expression %>}" 
      type="package.class" | 
   type="package.class"
}
{ /> | > other elements </jsp:useBean> }
 

The above is very UNintuitive discussion.

But thank you VERY much. Now I know the following:

"type" and "beanName" are valid together if they appear together in <jsp:useBean..>
without the "class" attribute.


However, I keep forgetting this fact. I have my exam in Very soon. I wish HF Book stuck this in my mind better that the above way :-)
[ December 31, 2006: Message edited by: Firas Zuriekat ]

[Sreeraj G Harilal]

I think 1 is not correct because the extension(.ser).