Array: Count occurrence of numbers

Question: Write a program that generates random integers between 1 and 100 and counts the occurrences of each.

package Array;

import java.lang.Math;

/**
 * Write a program that generates random integers between 1 and 100 and counts the occurrences of each.
 * Created by aarushi on 8/5/21.
 */
public class Ch7Ex3 {

    /*
    Step 1: Generate random numbers between 1 and 100 and store them in an array
    Step 2: Create a function that counts the occurrence of each number
        Step 2.1: Create an array count which will store the count of the numbers
        Step 2.2: Initialize count array with zero
        Step 2.3: Loop through the length of count and increase the count on the index of the elements
                  in array (count[array[i]]++)
    Step 3: Display count where count>0
     */

    public static void main (String [] args){
        int [] array= new int [10];
        createArray(array);
        int [] count= countOccurrence(array);
        display(array, count);
    }

    public static void createArray (int [] array){
        for (int i=0; i<array.length; i++){
            do{
                array[i]= (int)(Math.random()*100); 
            } while (array[i]==0); //integer has to be between 1 and 100
            System.out.print(array[i] + " ");
        }
        System.out.println();
    }

    public static int [] countOccurrence (int [] array){
        int [] count= new int [100];
        for (int i=0; i<count.length; i++){
            count[i]=0;
        }

        for (int i=0; i<array.length; i++){
                count[array[i]]++;
        }
        return count;
    }

    public static void display (int [] array, int [] count){
        for (int i=0; i<count.length; i++){
            if (count[i]>0){
                System.out.println(i + " appears " + count[i] + " times");
            }
        }
    }
}

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