Most frequent character

Return the character that appears most often in a non-empty String. If two characters tie, return the one that appears earliest. A simple approach: for each character, count how many times it occurs, and keep the best so far — using a strict > so a tie keeps the earlier character.

Complete mostFrequentChar(String s) so it returns the most-common character. On a tie, return the one that appears earliest. Assume s is not empty.

public class Freq {
    public static char mostFrequentChar(String s) {
        return '?';   // change this
    }
}

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Most frequent character

Most frequent character

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