65. Valid Number

65. Valid Number

Validate if a given string is numeric.

Some examples: “0” => true ” 0.1 ” => true “abc” => false “1 a” => false “2e10” => true Note: It is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one.

Update (2015-02-10): The signature of the C++ function had been updated. If you still see your function signature accepts a const char * argument, please click the reload button to reset your code definition.

class Solution { public boolean isNumber(String s) { if(s.trim().isEmpty()){ return false; } String regex = "[-+]?(\\d+\\.?|\\.\\d+)\\d*(e[-+]?\\d+)?"; if(s.trim().matches(regex)){ return true; }else{ return false; } }}

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