How can I tell if a String is a double?

How can I tell if a certain String represents a double value? I'm sure it's something very simple, but I can't find it...
for example, String s = "45.432"...

If the sting is a single(or called short) or int-typed, will there be any exception?I agree that, for example, "1" can be parsed as an int (or short)... but then also as a double.
I don't think the OP's intent was to determine whether the String was a valid double and not a valid int / short. But I may be wrong.

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How can I tell if a String is a double?

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