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How can I get the string with more lowercase characters from a given List<String>?

I've already done it in a functional way, using Java 10 Streams, but I want to do it in an iterative way, using while loops. But I have no idea how to do it.
This is my functional code.

public static Optional<String> stringSearched (List<String> pl) 
 return pl.stream()
 .max(Comparator.comparing(x->x.chars()
 .filter(Character::iLowerCase)
 .count()
 ));

import java.util.ArrayList;
import java.util.List;

public class Something 
 public static void main(String args)
 ArrayList<String> list = new ArrayList<String>();
 list.add("LOSER");
 list.add("wInner");
 list.add("sECONDpLACE");

 System.out.println(findMoreLowerCase(list));
 

 private static String findMoreLowerCase(final List<String> list)
 String moreLowerCase = ""; // Tracks the current string with less lowercase
 int nrOfLowerCase=0; // Tracks the nr of lowercase for that string

 int current; // Used in the for loop
 for(String word: list)
 current = countLowerCase(word);
 if(current > nrOfLowerCase)
 // Found a string with more lowercase, update
 nrOfLowerCase = current;
 moreLowerCase = word;
 
 
 return moreLowerCase;
 

 private static int countLowerCase(String s)
 // Scroll each character and count 
 int result = 0;
 for (char letter : s.toCharArray()) 
 if (Character.isLowerCase(letter))
 ++result;
 ;
 
 return result;
 

The easiest way would to be to iterate over all your words and replace non lower case letters (with a regular expression such as [^a-z]) with empty strings, and then get the length of the string.

The longest string is the one that has the most lower case letters.

private String moreLowerCase(final List<String> stringList) 
 String moreLowerCase = "";
 final Iterator<String> iterator = stringList.iterator();

 while (iterator.hasNext()) 
 final String current = iterator.next().replaceAll("[^a-z]", "");
 if (current.length() > moreLowerCase.length())
 moreLowerCase = current;
 
return moreLowerCase;