Could somebody write comments for each line of code explaining what each line does? I got this code from the book and it tells you which numbers come up the most frequently in arrays. I just need help comprehending each of the loops and if/else variables

import java.util.*;

public class lastIndexOf

{

public static void main(String[] args){

int a[]={27, 15, 15, 11, 27};

int b[]={27, 15, 15, 11, 27,15};

int c[]={27, 15,11, 15, 11, 27};

System.out.println("The mode of a is " + mode(a));

System.out.println("The mode of b is "+ mode(b));

System.out.println("The mode of c is " + mode(c));

}

public static int mode(int[] array) {

int[] spareArray = new int[101];

for (int i = 0; i < array.length; i++) {

spareArray[array[i]]++;

}

int mode = 101;

int count = 0;

for (int i = 0; i < spareArray.length; i++) {

if (spareArray[i] > count) {

count = spareArray[i];

mode = i;

}

}

return mode;

}

}