Reverse an integer

ReverseInteger.java

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

//Testing:

public class Solution {
  
  public static void main(String[] args){
    int x = 123456789;
    int y = reverse(x);
    
    System.out.println("reversed: " + y);
    
  }
    
  public static int reverse(int x) {
    long rev = 0;
    while(x != 0){
      rev = rev*10 + x%10;
      System.out.println("reversed interim: " + rev);
      if (rev > Integer.MAX_VALUE || rev < Integer.MIN_VALUE){
        return 0;
      }
      x = x/10;
    }

    return (int)rev;
  }
}

/*output:

reversed interim: 9
reversed interim: 98
reversed interim: 987
reversed interim: 9876
reversed interim: 98765
reversed interim: 987654
reversed interim: 9876543
reversed interim: 98765432
reversed interim: 987654321
reversed: 987654321


*/