Generating Integers and Checking the Count of Each in Java

Problem:

(Counting single digits) Write a program that generates one hundred random integers between 0 and 9 and displays the count for each number. Hint: Use (int)(Math.random() * 10) to generate a random integer between 0 and 9. Use an array of ten integers, say counts, to store the counts for the number of 0's, 1's, ..., 9's.

Solution:

public class RandomNumbers {
 
 public static void main(String[] args) {
  int[] frequency = new int[10];
  
  for(int i = 0; i < 100; i++){
   int randomNumber = generate();
   frequency[randomNumber]++;
  }
  
  printArray(frequency);
 }
 
 private static int generate(){
  return (int)(Math.random() * 10);
 }
 
 private static void printArray(int[] array){
  for(int i = 0, size = array.length; i < size; i++ ){
   System.out.println(i + " frequence -> " + array[i]);
  }
 }
 
}