java code

[plork123]

Hello

Can anyone help me out here

I have a class, with one method

public class getUniqueId
{
public String uniqueId()
{
UID uniqueUserId = new UID();
//System.out.println("User id :"+uniqueUserId);

return uniqueUserId.toString();
}
}

I have another class file where i want to call the uniqueId() method

This doen't work

String uid = getUniqueId.uniqueId();

I'm being a bit think here, can someone help me out

Cheers

 

[Diancecht]

To access a method of a class, you need to instantiate an object.

getUniqueId agetUniqueId = new getUniqueId();
String uid = agetUniqueId.uniqueId();

The othre way is to declare the uniqueId() method static.

Cheers,

Dian

 

[plork123]

thanks

one question, why should i use static

 

[drewdaman]

because static methods are created regardless of whether or not there is an instance of the object. same goes for static variables.

you have static methods and instance methods.. what you have in your code is an instance method. if there is no instance, there is no instance method..

 

[drewdaman]

each instance of an object gets its own copy of an instance method.. therefore, if there is no instance, there is no method!

sorry.. forgot to metnion that.. can't seem to edit my post

 

[timw]

On a separate point, the naming of your class and the method are better t'other way around (for good OO semantics). So

public class UniqueId
{
    public String getUniqueId()
    {      
        UID uniqueUserId = new UID();
        //System.out.println("User id :"+uniqueUserId); 
        
        return uniqueUserId.toString();
    }
}

Methods are 'actions' and are best named a such, such as 'get...', 'set..', 'draw...', 'put...', 'kick...' and so on.

Classes are 'things' and should really be named as nouns.


Tim
---------------------------
"Your morbid fear of losing,
destroys the lives you're using." - Ozzy