javabean constructors

[Michael Ni <mi...@hotmail.com>]

can someone explain to me how contructors work with java beans in a jsp 
page?  heres my question, in the following bean foo1 which does not have a 
constructor, if i usebean and then getA, i can get the value of 3

class foo1 {
  int a = 3;
  int b = 4;

  //the rest of the get and set methods....
  getA() {
    return a;
  }
}

but....
in foo2 if i usebean and then getA, the constructor is not setting the 
values of a and b to the right value.  a and b are left as null.  How in a 
jsp page do i active the constructor.  I always assumed when you usebean it 
activates the constructor.

class foo2 {
  int a;
  int b;

  foo2() {
    a = 3; b = 4;
  }

  //the rest of the get and set methods....
  getA() {
    return a;
  }
}

mike



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Re: javabean constructors

[Henry Tang <he...@mail.utexas.edu>]

http://java.sun.com/products/jsp/tags/11/syntaxref1115.html

read above.

----- Original Message -----
From: "Michael Ni" <mi...@hotmail.com>
To: <to...@jakarta.apache.org>
Sent: Saturday, March 15, 2003 7:51 PM
Subject: javabean constructors


> can someone explain to me how contructors work with java beans in a jsp
> page?  heres my question, in the following bean foo1 which does not have a
> constructor, if i usebean and then getA, i can get the value of 3
>
> class foo1 {
>   int a = 3;
>   int b = 4;
>
>   //the rest of the get and set methods....
>   getA() {
>     return a;
>   }
> }
>
> but....
> in foo2 if i usebean and then getA, the constructor is not setting the
> values of a and b to the right value.  a and b are left as null.  How in a
> jsp page do i active the constructor.  I always assumed when you usebean
it
> activates the constructor.
>
> class foo2 {
>   int a;
>   int b;
>
>   foo2() {
>     a = 3; b = 4;
>   }
>
>   //the rest of the get and set methods....
>   getA() {
>     return a;
>   }
> }
>
> mike
>
>
>
> _________________________________________________________________
> Add photos to your e-mail with MSN 8. Get 2 months FREE*.
> http://join.msn.com/?page=features/featuredemail
>
>
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