import java.util.ArrayList;

/**
 * Write a description of class ArrayPractice here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class ArrayPractice
{
    public static void main(String[] args) {
       one();
       two();
    }

    public static void one() {
        int[] x = {3,4,5,5,6};
        //int[] x = new int[5];

        int[][] y = { {3,4,5,6},
                      {7,6,4,3,3,2,2,2,3},
                      {1,2,3,4,-5,6,7,7,45,4}
                    };

        for (int[] row : y) {
            for (int val : row) {
                System.out.print(val + " ");
            }
            System.out.println();
        }

        //int g = 33, r = 55, w = 0;  // g is..., r is ... , w = ....

        for (int i = 0, j = 3; i < 10; i += 1) {

        }

        boolean finished = false;

        for (int row = 0; !finished && row < y.length; row += 1) {

            for (int col = 0; !finished && col < y[row].length; col += 1) {
                if (y[row][col] < 0) {
                    finished = true;
                }
                else {
                    System.out.print(y[row][col] + " ");
                }
            }
            System.out.println();
        }
        if (finished) {
                System.out.println("early exit, negative found");
            }
        else {
                System.out.println("no negative");
            }


        String[][] s = { {"abc"},
                         {"bob", "ertt"},
                         null
                       };
        String[] ss = {"abc", "def", "hig"};
        s[2] = ss;
        System.out.println( s[2].length);
    }

    public static void two() {
        int[][] x = new int[10][3];
        int[] t = {1,2,3};
        x[0] = t;
        x[1] = t;
        x[2] = t;
        t = new int[10];
        x[2] = t;
        t[1] = 99;
        print2Dint(x);
    }

    public static void three() {
        ArrayList<ArrayList<Integer>> twoD = new ArrayList<>();
        ArrayList<int[]> demo = new ArrayList<>();
        ArrayList<Integer> x = new ArrayList<>();
        x.add(1); x.add(2); x.add(3);
        twoD.add(x);
        x = new ArrayList<>();
        x.add(34); x.add(23);
        twoD.add(x);
        print2DLists(twoD);
    }
    public static void print2DLists(ArrayList<ArrayList<Integer>> y) {
        for (ArrayList<Integer> row : y) {
            for (int val : row) {
                System.out.print(val + " ");
            }
            System.out.println();
        }
    }
    public static void print2Dint(int[][] y) {
        for (int[] row : y) {
            for (int val : row) {
                System.out.print(val + " ");
            }
            System.out.println();
        }
    }

}