73 Set Matrix Zeroes

public class Solution {
    public void setZeroes(int[][] matrix) {
        if (matrix == null || matrix.length == 0 || matrix[0].length == 0) {
            return;
        }
        
        int row = matrix.length;
        int col = matrix[0].length;
        boolean rowZero = false;
        boolean colZero = false;
        
        for (int i =  0; i < col; i++) {
            if (matrix[0][i] == 0) {
                rowZero = true;
                break;
            }
        }
        
        for (int j = 0; j < row; j++) {
            if (matrix[j][0] == 0) {
                colZero = true;
                break;
            }
        }
        
        for (int i = 1; i < row; i++) {
            for (int j = 1; j < col; j++) {
                if (matrix[i][j] == 0) {
                    matrix[0][j] = 0;
                    matrix[i][0] = 0;
                }
            }
        }
        
        for (int i = 1; i < row; i++) {
            for (int j = 1; j < col; j++) {
                if (matrix[i][0] == 0 || matrix[0][j] == 0) {
                    matrix[i][j] = 0;
                }
            }
        }
        
       if(rowZero){
            for(int i = 0; i < col; i++){
                matrix[0][i] = 0;
            }           
        }
        
        if(colZero){
            for(int i = 0; i < row; i++){
                matrix[i][0] = 0;
            }           
        }
    }
}

写的时候没有单独判断第一行和第一列， 应该提前判断第一行和第一列用不用变为零。