Write a mode method in Java to find the most frequently occurring element in an array

Question

The question goes:

Write a method called mode that returns the most frequently occurring element of an array of integers. Assume that the array has at le

Answer 1

I would use this code. It includes an instancesOf function, and it runs through each number.

public class MathFunctions {

public static int mode(final int[] n) {
    int maxKey = 0;
    int maxCounts = 0;

    for (int i : n) {
        if (instancesOf(i, n) > maxCounts) {
            maxCounts = instancesOf(i, n);
            maxKey = i;
        }
    }

    return maxKey;
}

public static int instancesOf(int n, int[] Array) {
    int occurences = 0;
    for (int j : Array) {
        occurences += j == n ? 1 : 0;
    }
    return occurences;
}

public static void main (String[] args) {
    //TODO Auto-generated method stub
    System.out.println(mode(new int[] {100,200,2,300,300,300,500}));
}
}

I noticed that the code Gubatron posted doesn't work on my computer; it gave me an ArrayIndexOutOfBoundsException.