Web Reference: Jul 23, 2025 · In the below example we are trying to access a HashMap by using the accessor method next () of the Iterator class but as the HashMap is empty we will be going to get NoSuchElementException. 33 returns an which exists specifically so that you don't need to operate on null values. Otherwise, throws a NoSuchElementException. An Optional will never expose its value if it is null. If you really have to, just check isPresent() and return null yourself. The java.util.NoSuchElementException: No value present exception is a clear indication of a programming mistake when working with Optional. It's essential to always handle the possibility of an absent value when working with Optional to prevent this runtime exception.
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