Can you store a variable inside a if-clause?

Question

I\'m kinda waiting for a \'no\' answer on this question.

I was interested if you can save a variable at the same time when you checking it in an if-clause.

Answer 1

if you want to limit the scope of Bar bar I'd add { and } around the code that Michael posted.

void foo()
{
    // some code ...

    // this block limits the scope of "Bar bar" so that the rest of the method cannot see 
    // it.
    {
        Bar bar;
        if(foo!=null && (bar = foo.getBar())!=null){
            System.out.println("Success: " + bar);
        } else {
            System.out.println("Failiure.");
        }
    }
}

You might also want to check into the null object pattern if it makes sense. I personally try to avoid things being null if I can... really think about if you want null to be allowed or not.