Java Collection - 如何insert In数组的Order方法使用二进制搜索

import java.util.Arrays;

public class Main {

  public static void main(String[] args) {
    insertInOrder(6);
    insertInOrder(17);
    insertInOrder(28);
    insertInOrder(-1);
    insertInOrder(19);
    insertInOrder(7);
    insertInOrder(12);

    System.out.println(Arrays.toString(array));

  }

  static int[] array = new int[20];
  static int target = -1;
  static int elements = 0;

  public static void insertInOrder(int n) {
    int pos = Arrays.binarySearch(array, 0, elements, n);
    if (pos < 0)
      pos = ~pos;
    if (pos < elements)
      System.arraycopy(array, pos, array, pos + 1, elements - pos);
    array[pos] = n;
    elements++;
  }
}