从ArrayList检索二维数组的问题

import java.util.ArrayList;
import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        ArrayList<Object> list = new ArrayList<>();
        list.add(new int[][]{{1, 2}, {3, 4}});
        list.add(new int[][]{{5, 6}, {7, 8}});
        list.add(new int[][]{{9, 10}, {11, 12}});

        int[][] targetArray = new int[][]{{5, 6}, {7, 8}};

        for (int i = 0; i < list.size(); i++) {
            Object obj = list.get(i);
            if (obj instanceof int[][]) {
                int[][] array = (int[][]) obj;
                if (Arrays.deepEquals(array, targetArray)) {
                    System.out.println("Found target array at index " + i);
                    System.out.println("Array content: " + Arrays.deepToString(array));
                    break;
                }
            }
        }
    }
}