Reverse Integer

ReverseInteger.java

public class Solution1 {
    public int reverse(int x) {

        if(x < 10 && x > -10){
            return x;
        }
        boolean negative = x < 0;
        char[] c = null;
        if(negative) {
            c = (x+"").substring(1).toCharArray();
        } else {
            c = (x+"").toCharArray();
        }
        
        char temp;
        for(int i = 0; i < c.length/2; i++) {
            temp = c[i];
            c[i] = c[c.length - 1 -i];
            c[c.length -1 -i] = temp;
        }
        
        String s = String.valueOf(c);
        return negative ? -Integer.parseInt(s) : Integer.parseInt(s);
    }
}

public class Solution {
    public int reverse(int x) {
       
        int newX = 0;
        while(x != 0) {
            newX *= 10;
            newX += x %10;
            x /= 10;
        }
        
        return newX;
        
    }
}