We start by getting the count of the bulls first which we can obtain by comparing all the characters at the same positions- if they are equal we increase the bull count by 1, else we get the count of the remaining digits for the 2 Strings in 2 different arrays by storing the count in their indexes. Next, we take the minimum of the array values as we don't want to count the repeated characters

```
public class Solution {
public String getHint(String secret, String guess) {
int b=0,c=0;
int arr1[]=new int[10];
int arr2[]=new int[10];
for(int i=0;i<secret.length();i++){
char ch1=secret.charAt(i);
char ch2=guess.charAt(i);
if(ch1==ch2){
b++;
}
else{
arr1[ch1-'0']++;
arr2[ch2-'0']++;
}
}
for(int i=0;i<10;i++){
c+=Math.min(arr1[i],arr2[i]);
}
return(b+""+"A"+c+""+"B");
}
}
```