如何在java中向ArrayList添加矩阵

import java.util.ArrayList;

public class MatrixExample {
    public static void main(String[] args) {
        ArrayList<int[]> matrixList = new ArrayList<>();

        int[] row1 = {1, 2, 3};
        int[] row2 = {4, 5, 6};
        int[] row3 = {7, 8, 9};

        matrixList.add(row1);
        matrixList.add(row2);
        matrixList.add(row3);

        // 打印矩阵
        for (int[] row : matrixList) {
            for (int num : row) {
                System.out.print(num + " ");
            }
            System.out.println();
        }
    }
}

1 2 3 
4 5 6 
7 8 9