Most frequent and least duplicate frequent number in array

Question

I'm trying to find the most frequent number and the least frequent duplicate number in an array E.g

[7, 5, 6, 4, 6, 5, 5, 8, 7, 0, 7, 5, 2, 9, 7, 9, 3, 4, 6]

These are the duplicate number in the array above:

1. "7" appears (4 times).
2. "5" appears (4 times).
3. "6" appears (3 times).
4. "4" appears (2 times).

"7" and "5" are the most frequent number, "4" is the least frequent duplicate.

When I tried to code, I was able to get the number 7, but then I don't know how to implement the least frequent.

This is the code I wrote:

String[] numbers = "7564655870752979346".split("");
        String elements = "";
        int count = 0;
        for (String tempElement : numbers) {
            int tempCount = 0;
            for (n = 0; n < numbers.length; n++) {
                if (numbers[n].equals(tempElement)) {
                    tempCount++;
                    if (tempCount > count) {
                        elements = tempElement;
                        //  System.out.println(elements);
                        count = tempCount;
                    }
                }
            }
        }
        System.out.println("Frequent number is: " + elements + " It appeared " + count+" times");

My solution above only prints out 7, and I don't know how to check for the least duplicate.

Answer 1

Write a function to find Min Repeated number(started from 2)

public static String findMin(String[] numbers, int counter) {
    int count = 0;
    String elements = "";
    for (String tempElement : numbers) {
        int tempCount = 0;
        for (int n = 0; n < numbers.length; n++) {
            if (numbers[n].equals(tempElement)) {
                tempCount++;
                if (tempCount > counter) {
                    count = 0;
                    break;
                }
                if (tempCount > count) {
                    elements = tempElement;
                    //  System.out.println(elements);
                    count = tempCount;
                }
            }
        }
        if(count == counter) {
            return elements;
        }
    }
    if(count < counter) {
        return "";
    }
    return elements;
}

A loop over numbers:

String x = "";
int c = 2;
do {
    x = findMin(numbers, c ++);
} while(x == "");

The whole code will be

public class X {

  public static String findMin(String[] numbers, int counter) {
    int count = 0;
    String elements = "";
    for (String tempElement: numbers) {
      int tempCount = 0;
      for (int n = 0; n < numbers.length; n++) {
        if (numbers[n].equals(tempElement)) {
          tempCount++;
          if (tempCount > counter) {
            count = 0;
            break;
          }
          if (tempCount > count) {
            elements = tempElement;
            //  System.out.println(elements);
            count = tempCount;
          }
        }
      }
      if (count == counter) {
        return elements;
      }
    }
    if (count < counter) {
      return "";
    }
    return elements;
  }

  public static void main(String[] args) {
    String[] numbers = "756655874075297346".split("");
    String elements = "";
    int count = 0;
    for (String tempElement: numbers) {
      int tempCount = 0;
      for (int n = 0; n < numbers.length; n++) {
        if (numbers[n].equals(tempElement)) {
          tempCount++;
          if (tempCount > count) {
            elements = tempElement;
            //  System.out.println(elements);
            count = tempCount;
          }
        }
      }
    }
    String x = "";
    int c = 2;
    do {
      x = findMin(numbers, c++);
    } while (x == "");

    System.out.println("Frequent number is: " + elements + " It appeared " + count + " times");

    System.out.println("Min Frequent number is: " + x + " It appeared " + (c - 1) + " times");
  }
}