About type and class attribute of jsp usebean

[Swagato Bhatta]

But this is what I think about type and class

type =" myType" class ="myClass"

basically means


myType myBean= new myClass();

Please corret me anyone if I am wrong
I am just on slow/fast learning curve

[Pramod P Deore]

yes you are right


type==reference type
class==object type

[Swagato Bhatta]

Pramod P Deore wrote:yes you are right


type==reference type
class==object type

So was I right or wrong?

[Pramod P Deore]

yes you are right

type can store object of class.

[Bear Bibeault]

Almost. It's not always true that a new bean will be created.

[Swagato Bhatta]

Bear Bibeault wrote:Almost. It's not always true that a new bean will be created.

Now I am confused. Example please

[Bear Bibeault]

If a bean is already bound in the specified scope with the same name, it will be attached. A new bean is created only if one does not already exist.

[Swagato Bhatta]

Bear Bibeault wrote:If a bean is already bound in the specified scope with the same name, it will be attached. A new bean is created only if one does not already exist.

You mean the body of the useBean will be executed iff bean DOES NOT exist in the scope. Am I right?

[Ankit Garg]

Basically what Bear is saying is

<jsP:useBean type=" myType" class ="myClass" id="whatever">

Will not always mean

myType myBean= new myClass();

If there is a bean named whatever in page scope, then a new instance of myClass will not be created. Also the bean in the page scope might not be of type myClass...

[Frits Walraven]

I think what Bear tries to say is that if the object is already in any scope, it will not be created with the jsp:useBean statement. Consequently if you have one or more jsp:setProperties as an body of the jsp:useBean (and the object is already in scope), those setters won't be called.

regards,
Frits