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Regular expression for positive and a negative decimal value in java

Answer 1

A:

Try this:

[+-]?\d+\.\d+

Rubens Farias 2010-01-15 14:36:16

Note that this will fail to recognize patterns like ".4" (no leading zero) or "10" (no decimal). But given the vagueness of the "question," I have no idea if that's a problem or not.

BlairHippo 2010-01-15 14:45:17

yeah; since OP said "decimal", I think decimal point is mandatory, but I'm also unsure about that optional integer

Rubens Farias 2010-01-15 16:36:52

Well, if we go with the mandatory decimal point, could always do it as "[+-]?\d*\.\d+". Handles the optional leading 0, at least.

BlairHippo 2010-01-15 17:18:02

'Decimal' does not mean non-integer. What if OP had said 'binary' or 'octal'? All those qualifiers just limit the range of digits. All such numbers may or may not have a fraction.

gary 2010-01-15 21:48:37

You got a point, gary; but if we consider OP accept rate, we'll never know what he meant by decimal.

Rubens Farias 2010-01-15 23:28:04

Answer 2

A:

(\+|-)?([0-9]+(\.[0-9]+))

FreddyB 2010-01-15 14:37:29

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Regular expression for positive and a negative decimal value in java

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