Palindrome Number

Determine whether an integer is a palindrome. Do this without extra space.

Solution:

public class Solution {
    public boolean isPalindrome(int x) {
        if(x<0) return false;
        return x== reverse(x);
    }
     private int reverse(int x) {
        int sign = x<0? -1:1;
        x= Math.abs(x);
        StringBuilder rt = new StringBuilder(String.valueOf(x));
        rt.reverse();
        try{
            return Integer.parseInt(rt.toString())*sign;
        }
        catch(Exception e){
            return 0;
        }

    }
}