A static null-coalescing method

[Emre Kaplan]

Hello,

I think java.util.Optional class should have a static method named like
getOrDefault(Object o, Object default)

In short, if an object is null, it should return the default object,
otherwise the same object. And inside, default null check should be done.
Same result can be achieved by method chaining of ofNullable and orElse,
but then an object is created. I think it will be memory efficient because
only one static method needs to be called. I don't know if it has been
discussed before.

Also there is Objects.requireNonNullElse(Object o1, Object o2)
but the second parameter should be non-null.

Thanks in advance..
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