public class DayCode {    public static void main(String[] args) {        int[][] matrix = {{1,1,1},{1,0,1},{1,1,1}};        System.out.println(Arrays.deepToString(matrix));        new DayCode().setZeroes(matrix);        System.out.println(Arrays.deepToString(matrix));    }
    /**     * 链接 https://leetcode-cn.com/problems/set-matrix-zeroes/     * 时间复杂度 O(m * n)     * 空间复杂度 O(m + n)     * @param matrix     */    public void setZeroes(int[][] matrix) {        int m = matrix.length;        int n = matrix[0].length;        boolean[] row = new boolean[m];        boolean[] col = new boolean[n];        for (int i = 0; i < m; i++) {            for (int j = 0; j < n; j++) {                if (matrix[i][j] == 0) {                    row[i] = col[j] = true;                }            }        }
        for (int i = 0; i < m ;i++) {            for (int j = 0; j < n; j++) {                if (row[i] || col[j]) {                    matrix[i][j] = 0;                }            }        }    }}