Java 8: assigning a value from a stream to a variable?

I just started to learn streams in java8. I am trying to convert a basic for each loop into a stream that does the exact same thing. I have checked around here and found this:
https://stackoverflow.com/questions/56274366/convert-for-loop-into-java-stream. The issue with this is that the example collects the results at the end and I don't think I need to collect anything but to assign the value which is not explained.

the loop which I want to convert is this. As you can see I want to assign the value to the vanTire.

VanTire vanTire = null;

        for (Object tire : tireList) {
            if (tire instanceof VanTire) {
                vanTire = (VanTire) tire;
            }
        }

What I have so far with streams is this. How do I assign the value to the vanTire variable since filtering and casting is already done?

tireList.stream()
    .filter(VanTire.class::isInstance)
    .map(VanTire.class::cast)

After getting the correct items, you need to use .findFirst or .findAny to get an element, along with orElse to provide a default value

VanTire vanTire = (VanTire) tireList.stream().filter(VanTire.class::isInstance)
                                    .findAny().orElse(null);

• .elseGet and .elseThrow in Optional documentation

• .findFirst or .findAny inStream documentation

In general, Streams should be stateless. This is due to the fact that the elements in Streams might be processed out of order. Thus, I would suggest a solution that does not assing the value from within the Stream, but rather yield a result from the stream that is assignable to the desired type:

VanTire vanTire = tireList.stream()
    .filter(VanTire.class::isInstance)
    .findAny()
    .map(VanTire.class::cast)
    .orElse(null);

I used .orElse(null) since this maps to the semantics of the sample code provided wrt. the behaviour when tireList is empty. Depending on the business case, however, continuing computation with an Optional or calling orElseThrow(...) might be a better option.