Please explain each problem in the following code and explain what the whole code is designed to do at the end. I will definitely give you helpful evaluation if you finished it, thank you!

//Code begining:

import java.util.*;

public class g_sAlgorithm {

public static int[] stable_Matching_man(int n, int[][] m_Preferences, int[][] w_Preferences) { int[] matched = new int[n]; Arrays.fill(matched, -1); //What does 'fill' mean here? What does the (matched, -1) in parentheses stand for?

Queue freeMen = new LinkedList<>(); // What is Queue used for here? How does this serve the following programming? for (int i = 0; i < n; i++) { freeMen.add(i); }

while (!freeMen.isEmpty()) { int man = freeMen.poll(); for (int i = 0; i < n; i++) { int woman = m_Preferences[man][i]; if (matched[woman] == -1) { matched[woman] = man; break; } else { int otherMan = matched[woman]; int w_RankFor_M = w_Preferences[woman][man]; int w_RankForOther_M = w_Preferences[woman][otherMan]; if (w_RankFor_M < w_RankForOther_M) { matched[woman] = man; freeMen.add(otherMan); break; //How is the aboveif statement designed here? Please briefly elaborate } } } }

return matched; }

public static void main(String[] args) { int n = 4; int[][] m_Preferences = {{1, 2, 3, 0}, {0, 3, 1, 2}, {0, 2, 3, 1}, {1, 0, 2, 3}}; int[][] w_Preferences = {{0, 2, 1, 3}, {1, 0, 3, 2}, {0, 2, 1, 3}, {3, 0, 2, 1}};

int[] matched_man = stable_Matching_man(n, m_Preferences, w_Preferences); System.out.println("Final matched for man Preferences is: " + Arrays.toString(matched_man)+" "); } }