> From: "Andreas Zieritz" <
[hidden email]>
>
> This should really be 'basic stuff', I know...
>
> When I write
>
> a = 1
> b = a
>
> b is more or less a pointer to a, it is not a copy. So if I change a, the
> value of b changes, too.
>
> What if I want a 'copy' of a? (I need that when copying an array).
First, you only need a copy of an object if the object is mutable.
In this case, the object's class often implements the Clonable
interface. You can then use the object's clone method.
So for example
a = aMutableClass()
b = a.clone
will fit your need.
If the object is mutable but does not implement the Clonable
interface, then the fun begin.
But remember that many objects (including Rexx, String, etc.) are
in fact immutable, and hence the copy is not needed.
Martin
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