Hi,

I realise that using a local variable for some object you need multiple
times in a method is useful, especially if it is computation intensive
to compute that object (or value).  I was just wondering whether this is
still the case if the method for getting to that object is a simple
getter which does only return an instance variable (immutable, no copy
needed).

Concrete:

class Local{
    private Object example = new Object();
    public Object getExample(){
        return example;
    }

    public void someMethod(){
        int someInt = getExample().hashCode();
        Class someClass = getExample().getClass();
        // more instructions, invoking getExample()
    }

    public void equivalentMethod(){
        Object ex = getExample();
        int someInt = ex.hashCode();
        Class someClass = ex.getClass();
        // more instructions, using ex
    }

}

Which of those two methods would be preferable?

Thanks, H.
- --
Hendrik Maryns

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