Maximum occurring character in Java ..ftc

Given a string, Write an efficient java method to return maximum occurring character in the input string

E.g., if input string is “test” then function should return ‘ t ‘ (the most occurring character in the string).

Input:
Enter any String: test

Output:
Most Repeated character: t and its Count is: 2

import java.io.*;
import java.util.Scanner;
public class temp{
  static void maxim(String str){
    int[] arr = new int[str.length()];
    for (int i=0;i<str.length();i++){
      arr[i]=0;
      for (int j = 0;j<str.length();j++){
        if(str.charAt(i)==str.charAt(j)){
          arr[i]++;
        }
      }
    }

    int max = arr[0];
    int max2=0;

    for(int i = 0; i<arr.length;i++){
      if (arr[i]>max){
        max=arr[i];
        max2 = i;
      }
    }
    System.out.println(String.format("Most Repeated character: %s and its Count is: %d",str.charAt(max2),max));
  }
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    System.out.print("Enter any string:  ");
    String str = scan.nextLine();

    maxim(str);
  }
}

INPUT_1:
Enter any string:  test

OUTPUT:
Most Repeated character:  t  and its Count is:  2

INPUT_2:
Enter any string:  jojo’s bizzare adventure
OUTPUT:
Most Repeated character:  e  and its Count is: 3

INPUT_3:
Enter any string:  danmachi
OUTPUT:
Most Repeated character:  a  and its Count is:  2

INPUT_4:
Enter any string:  kakegurui
OUTPUT:
Most Repeated character:  k  and its Count is:  2

INPUT_5:
Enter any string:  bigbangtheory
OUTPUT:
Most Repeated character:  b  and its Count is:  2

INPUT_6:
Enter any string:  karakuri circus
OUTPUT:
Most Repeated character:  r  and its Count is:  3

INPUT_7:
Enter any string:  How not to summon demon lord

OUTPUT:
Most Repeated character:  o  and its Count is:  6

ILLUSTRATION