Strings-Max Frequency Character [codingblocks]

Take as input S, a string. Write a function that returns the character with maximum frequency. Print the value returned.

Input Format
String

Constraints
A string of length between 1 to 1000.

Output Format
Character

Sample Input
aaabacb

 
Sample Output
a

 
Explanation
For the given input string, a appear 4 times. Hence, it is the most frequent character.

 JAVA Code:

IDE Code: https://ide.geeksforgeeks.org/VUq5fnc859

 

/*
Amit Kumar
14-12-2020
IDE Code: https://ide.geeksforgeeks.org/VUq5fnc859
*/

package String;
import java.util.HashMap;
import java.util.Scanner;

public class Strings_MaxFrequencyCharacter {
    public static Scanner scanner = new Scanner(System.in);
    public static void main(String[] args) {
        String str = scanner.next();
        int max = Integer.MIN_VALUE;
        char maxCountChar = '\0';
        HashMap<Character, Integer> hashMap = new HashMap<Character, Integer>();hashMap.get(0);
        for (int i=0; i<str.length(); i++) {
            if (hashMap.containsKey(str.charAt(i))) {
                hashMap.put(str.charAt(i), hashMap.get(str.charAt(i)) + 1);
            } else {
                hashMap.put(str.charAt(i), 1);
            }
            if (hashMap.get(str.charAt(i)) > max) {
                max = hashMap.get(str.charAt(i));
                maxCountChar = str.charAt(i);
            }
        }
        System.out.println(maxCountChar);
    }
}