Java conditional operator ?: result type

Question

I\'m a bit puzzled about the conditional operator. Consider the following two lines:

Float f1 = false? 1.0f: null;
Float f2 = false? 1.0f: false? 1.0f: null;         


        

Answer 1

It looks like the JVM tries to unbox the second null to float instead of Float, thus NullPointerException. Hit it myself once. My take is that the second if does it because the true part of the first if evaluates as a float, not a Float.

After giving it a second thought, I think this a way of Java telling you that you are doing something strange. Just don't nest ternary ifs and you will be fine :-)