```
public class Solution {
public boolean isPalindrome(int x) {
if (x<0){
return false;
}
int div =1;
int length =1;
while(x/div>=10){
div*=10;
length++;
}
for (int i=0;i<length/2 ;i++){
if (x%10 != x/div %10){
return false;
}
x /= 10;
div /= 100;
}
return true;
}
}
```