如何将List<List<String>>转换为Object[][]

public Object[][] convertListToObjectArray(List<List<String>> list) {
    int rows = list.size();
    int cols = 0;
    for (List<String> innerList : list) {
        cols = Math.max(cols, innerList.size());
    }
    
    Object[][] result = new Object[rows][cols];
    
    for (int i = 0; i < rows; i++) {
        List<String> innerList = list.get(i);
        for (int j = 0; j < cols; j++) {
            if (j < innerList.size()) {
                result[i][j] = (Object) innerList.get(j);
            } else {
                result[i][j] = null;
            }
        }
    }
    
    return result;
}