[leetcode]Valid Number

问题描述:

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.

考虑：93.3f, 23.43D ， 2341234L等数字均为无效数字，数字中包含的字母只能是e

代码：

public class Valid_Number { //java public boolean isNumber(String s) {        if(s == null || s.trim().isEmpty())        return false;        s = s.trim().toLowerCase();        char ch = s.charAt(s.length()-1);        if(ch =='f' || ch =='l' || ch =='d')        return false;        try{        Double.valueOf(s);        return true;        }catch(Exception e){        return false;        }    }}