smalltalk - Syntax for class and instance variables and methods in Pharo 4.0 -

i learning pharo online , not sure if got syntax correct creating class , instance variables. please correct me if wrong :-

class (static) method created on class side of pharo, name, email, phone instance variables of class createuser:

createnewuser:arguments name:username email:useremail phone:userphone 

to call static method of class createuser, following :-

createuser       name:username      email:useremail      phone:userphone 

if want create instance variable name, method declaration same above, on instance side of class. however, when call method, call using keyword "new" create new instance under:

createuser new      name:username      email:useremail      phone:userphone 

when run above code , call method statically, error message as:-

messagenotunderstood: createuser class >>name:email:phone: 

however, when go createuser class recheck, see above method create on class side :

createuser:name:email:phone: 

my queries below: 1. doing wrong above? how can fix above error? 2. concept behind using static variables/methods vs class variables/methods same java? 3. if wish access above instance variables, can add accessor methods class/instance , call them class instance/class object instance. correct?

any can give appreciated! in advance.

i guess misunderstand method syntax bit, because createnewuser:arguments part makes no sense. should have method on class side this:

name: username email: useremail phone: userphone    "and here have like:"    name := username.    email := useremail.    "and on" 

in example name:email:phone: method's selector , username, useremail , userphone parameters. can call method in example. name , email either class side on instance side variables depending on method defined.

also shouldn't name class createuser. think this, instances called? "createusers"? name class user, can think instances "users", , responsibility of class object "to create users (its instances)".

please note, it's weird have method on class side. create instance method:

initializename: username email: useremail phone: userphone    name := username.    email := useremail.    phone := userphone 

and class side method:

newname: username email: useremail phone: userphone    | instance |    instance := self new.    instance initializename: username email: useremail phone: userphone.    ^ instance 

or shorter version using cascaded messages:

newname: username email: useremail phone: userphone    ^ self new       initializename: username email: useremail phone: userphone;       

2) in pharo (and smalltalk) concept bit simpler. object, class object also, class side variables , methods instance variables , methods of class instance of "class class". next picture may understand associations between objects in pharo:

this may bit confusing @ beginning, in end, don't have , static/nonstatic methods/variables, have objects, instantiation , inheritance.

so should think going ask objects about. should ask user it's email or mobile number, ask user class create user or find user, or suggest default t-shirt size user.

3) yes, should make accessor. moreover, if select class in system browser , press cmd+h+a (or ctrl, or alt) depending on os, dialog automatic accessor creation