Remove a given element from an array

[SharedMocha]

//https://www.interviewbit.com/problems/remove-duplicates-from-sorted-array/
public class Solution {
public int removeElement(ArrayList a, int b) {
int PA =0;
int PB =0;

 while(PA < a.size()){
 if(a.get(PA) == b){
 a.remove(PA);
 
 }else{
 PA++;
 }
 }
 return a.size();
}

}