Can you really call it a "Yoda condition"?
Yoda conditions have been born to avoid hard-to-catch mistakes, like an assignment in a condition statement. If variable is null in your first example you catch it immediately, because it throws a NullPointerException as you mentioned.
So it doesn't save you from a mistake; it saves you from checking if the value is null or not. And honestly I'm not sure it's what I'd want: if I expect a string there, why am I dealing with null?
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