Skip to main content
Skip table of contents

How to create a table based on a two-dimensional array?

I have a series of list in this list:

private List<List<String>> tableOverallList;

This object contains 8 values in each list. I need to place it in the table created. I would like to have 2 Rows with 8 columns:

String[] tableTitleList = {" Title", " (Re)set", " Obs", " Mean",
    " Std.Dev", " Min", " Max", "Unit"};
List<String> tabTitleList = Arrays.asList(tableTitleList);

Please help me to place the 1st list of values inside the List tableOverallList in the 2nd Row. I will try managing with the rest of the list.

PdfPTable table = new PdfPTable(3); // 3 columns.
PdfPCell cell1 = new PdfPCell(new Paragraph("Cell 1"));
PdfPCell cell2 = new PdfPCell(new Paragraph("Cell 2"));
PdfPCell cell3 = new PdfPCell(new Paragraph("Cell 3"));
PdfPCell cell4 = new PdfPCell(new Paragraph("Cell 4"));
PdfPCell cell5 = new PdfPCell(new Paragraph("Cell 5"));
PdfPCell cell6 = new PdfPCell(new Paragraph("Cell 6"));
PdfPCell cell7 = new PdfPCell(new Paragraph("Cell 7"));
PdfPCell cell8 = new PdfPCell(new Paragraph("Cell 8"));

Posted on StackOverflow on Jun 25, 2014 by srinivasan

That's really easy. So you have data in a nested list. For instance:

public List<List<String>> getData() {
    List<List<String>> data = new ArrayList<List<String>>();
    String[] tableTitleList = {" Title", " (Re)set", " Obs", " Mean",
        " Std.Dev", " Min", " Max", "Unit"};
    for (int i = 0; i < 10; ) {
        List<String> dataLine = new ArrayList<String>();
        for (int j = 0; j < tableTitleList.length; j++) {
            dataLine.add(tableTitleList[j] + " " + i);
    return data;

This will return a set of data where the first record is a title row and the following 10 rows contain mock-up data. It is assumed that this is data you have.

Now when you want to render this data in a table, you do this:

PdfPTable table = new PdfPTable(8);
List<List<String>> dataset = getData();
for (List<String> record : dataset) {
    for (String field : record) {

The result will look like this:

Resulting table

Resulting table

You can find the full source code here: ArrayToTable and this is the resulting PDF: array_to_table.pdf

If you only want 2 rows, a title row and a data row, change the following line:

for (int i = 0; i < 10; ) {

Into this:

for (int i = 0; i < 2; ) {

I've provided a more generic solution because it's more elegant to have generic code.

Click this link if you want to see how to answer this in iText 7.

JavaScript errors detected

Please note, these errors can depend on your browser setup.

If this problem persists, please contact our support.