How to get the first non-null value in Java?
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Published on 2010-05-04T18:44:13Z
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2010/05/04
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Is there a Java equivalent of SQL's COALESCE function? That is, is there any way to return the first non-null value of several variables?
e.g.
Double a = null;
Double b = 4.4;
Double c = null;
I want to somehow have a statement that will return the first non-null value of a, b, and c - in this case, it would return b, or 4.4. (Something like the sql method - return COALESCE(a,b,c)). I know that I can do it explicitly with something like:
return a != null ? a : (b != null ? b : c)
But I wondered if there was any built-in, accepted function to accomplish this.
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