java - Recursion- Kata challenge -

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the challenge remove zeros @ end of number. zeros within 2 number okay. eg:

14000 == 14 //all end zeros removed
10300 == 103 // end zeros removed

i wrote function solve problem: 

    public class noboring {     public static int noboringzeros(int n) {       system.out.println(n); // testing        system.out.println(math.abs(n % 10)); //testing         if(math.abs(n % 10) != 0){           return n;         }       return noboringzeros(n/10);     } }

unfortunately doesnt work negative inputs. see output of test case below: 

//ld = last digit of number //zr 0 removed         fixed tests: noboringzeros     1450     0 //ld     145 //zr     5 //ld     960000      0 //ld     96000 //zr     0 //ld     9600 //zr     0 //ld     960 //zr     0 //ld     96 //zr     6 //ld     1050     0 //ld     105 //zr     5 //ld     -1050     0 //ld     -105 //zr     5 //ld     -105      5     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0

i dont understand why failing? have thought drop out statement of n % 10 not = 0 cause return of n doesnt seem todo negative numbers?

if not comfortable math functions , can use string fucntions:

     int n = -22400 ; // want -224                 string str = string.valueof(n);       while(str.endswith("0")){              if (str != null && str.length() > 0 && str.charat(str.length()-1)=='0') {                   str = str.substring(0, str.length()-1);             }          }       system.out.println(integer.parseint(str));

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