List<List<Integer>> example

import java.util.LinkedList;
import java.util.List;

public class LList {
  public static void main(String[] args) {
    List<List<Integer>> list = new LinkedList<>();
    for (int x = 0; x < 9; ++x) {
      list.add(new LinkedList<>());
      for (int y = 0; y < 9; ++y) {
        list.get(x).add((x + 1) * (y + 1));
      }
    }
    list.stream().forEach(System.out::println);
    for (int i = 0; i < 9; ++i) {
      list.get(i).set(i, 0);
    }
    System.out.println();
    list.stream().forEach(System.out::println);
  }
}