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NoSuchElementException Exception Via orElseThrow() Since Java 10. Using the Optional. orElseThrow() method represents another elegant alternative to the isPresent()-get() pair. Sometimes, when an Optional value is not present, all you want to do is to throw a java.
Optional is primarily intended for use as a method return type where there is a clear need to represent "no result," and where using null is likely to cause errors. A variable whose type is Optional should never itself be null .
If you just want an Optional returning false for isPresent() , you don't need to mock the Optional at all but just create an empty one. Of course this test only tests that the mock object actually returns the stubbed return value, but you get the idea.
It returns an Optional containing the value if is not empty and satisfy the specified predicate, an empty Optional otherwise.
Replace get() with orElse(null).
...findFirst().orElse(null);
Returns the value if present, otherwise returns null. The documentation says that the passed parameter may be null (what is forbidden for orElseGet and orElseThrow).
my solution was to check it this way
if(item.isPresent()){
item.get().setId("1q2w3e4r5t6y")
}
Optional was created so code could after all these decades, finally start avoiding null.
Remove the .get(), return the Optional itself and make the calling code deal with it appropriately (just as it would have to do in the case you'd be returning null).
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