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

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Tags: tablespublish databasearrayiText 7

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. 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"));
table.addCell(cell1);
table.addCell(cell2);
table.addCell(cell3);
table.addCell(cell4);
table.addCell(cell5);
table.addCell(cell6); 
table.addCell(cell7);
table.addCell(cell8);
document.add(table);
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"};
    data.add(Arrays.asList(tableTitleList));
    for (int i = 0; i < 10; ) {
        List<String> dataLine = new ArrayList<String>();
        i++;
        for (int j = 0; j < tableTitleList.length; j++) {
            dataLine.add(tableTitleList[j] + " " + i);
        }
        data.add(dataLine);
    }
    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:

Table table = new Table(8);
List<List<String>> dataset = getData();
for (List<String> record : dataset) {
    for (String field : record) {
        table.addCell(new Cell().add(new Paragraph(field)));
    }
}
doc.add(table);

Note that we use Table and Cell classes, because PdfPTable and PdfPCell don’t exist in iText 7. 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 question in iText 5.