1
class Solution {
2
  public boolean isNumber(String s) {
3
    try {
4
      int l = s.length();
5
      if (s.equals("Infinity")
6
          || s.equals("-Infinity")
7
          || s.equals("+Infinity")
8
          || s.charAt(l - 1) == 'f'
9
          || s.charAt(l - 1) == 'd'
10
          || s.charAt(l - 1) == 'D'
11
          || s.charAt(l - 1) == 'F') return false;
12
      double x = Double.parseDouble(s);
13
      return true;
14
    } catch (Exception e) {
15
      return false;
16
    }
17
  }
18
}