计算矩阵中1的节数(java)

public class MatrixOneCount {
    public static int countOnes(int[][] matrix) {
        int count = 0;
        for (int i = 0; i < matrix.length; i++) {
            for (int j = 0; j < matrix[0].length; j++) {
                if (matrix[i][j] == 1) {
                    count++;
                }
            }
        }
        return count;
    }

    public static void main(String[] args) {
        int[][] matrix = {
            {1, 0, 1},
            {0, 1, 0},
            {1, 1, 1}
        };
        int onesCount = countOnes(matrix);
        System.out.println("矩阵中1的个数为：" + onesCount);
    }
}