Java - Random Team with Numbers from list

I am Beginner in java I want to create a random team with numbers

I'm thinking of splitting this random list into 3 teams, what should I do? because one team only has 2 members

import java.util.Arrays;
import java.util.Collections;
public class RandomTeam {
  public static void main(String[] args) {
    Integer[] arr = new Integer[8];
    for (int i = 0; i < arr.length; i++) {
        arr[i] = i;
    }
    Collections.shuffle(Arrays.asList(arr));
    System.out.println(Arrays.toString(arr));
  }
}

Output

[3, 4, 2, 6, 7, 5, 0, 1]