leetcode/1-100/65. 有效数字.md

import java.util.regex.Pattern;
class Solution {
    public boolean isNumber(String s) {
        if(Pattern.matches("(\\+|-)?(\\d+\\.?|\\.\\d+|\\d+\\.\\d+)((e|E)(\\+|-)?\\d+)?", s)){
            return true;
        }
        return false;
    }
}