Java:如何检查数组中的元素是否已初始化？

import java.util.Arrays;

public class Main {
  public static void main(String[] args) {
    int[] arr = new int[10];

    System.out.println(Arrays.isInitialized(arr)); // false

    arr[0] = 1;
    arr[1] = 2;
    arr[2] = 3;
    arr[3] = 4;
    arr[4] = 5;
    arr[5] = 6;
    arr[6] = 7;
    arr[7] = 8;
    arr[8] = 9;
    arr[9] = 10;

    System.out.println(Arrays.isInitialized(arr)); // true
  }
}