Java nested list to array conversion

What is the most efficient way to convert data from nested lists to an object array (which can be used i.e. as data for JTable)?

List<List> table = new ArrayList<List>();

for (DATAROW rowData : entries) {
    List<String> row = new ArrayList<String>();

    for (String col : rowData.getDataColumn())
        row.add(col);

    table.add(row);
}

// I'm doing the conversion manually now, but
// I hope that there are better ways to achieve the same
Object[][] finalData = new String[table.size()][max];
for (int i = 0; i < table.size(); i++) {
    List<String> row = table.get(i);

    for (int j = 0; j < row.size(); j++)
        finalData[i][j] = row.get(j);
}

Many thanks!