```
public boolean isStrobogrammatic(String num) {
//0, 8, 1, 6-9
for(int i = 0 ; i <= (num.length()-1)/2; i++){
if(num.charAt(i) == '0' || num.charAt(i) == '8'
||num.charAt(i) == '1'){
if(num.charAt(i) == num.charAt(num.length()-1-i))
continue;
}else if(num.charAt(i) == '6' && num.charAt(num.length()-1-i) == '9'
|| num.charAt(i) == '9' && num.charAt(num.length()-1-i) == '6'){
continue;
}
return false;
}
return true;
}
```