Add To A Group And Show Group X 8 Times

I have this code:

Java Code:

package TheWorldCup;
import java.util.ArrayList;
import java.util.*;
public class WorldCup2014{
public static void main(String args[]){
ArrayList<String> WorldCupTeams = new ArrayList<>();

[Code] ....

What it is doing is printing the team name and all eight groups and showing the group is: team name under. I want it to print out the team name, put it into a group and print out the group. Once 4 teams in a group, close that group off, do this until all groups are filled. How can I do this?