Generate file . txt with three columns

Question

I have a system where I do some research at the bank and store everything in one Array, but I have to put together a layout with this data so that they can be printed as labels on a matrix printer.

The part of the lines I have already formatted, but I don’t know how to make the next record of the list instead of going to the next line turn a column.

I need to leave it that way:

What I can get these days is this:

In this case my query returned only two results, the right would be to put this second line in a column as in the first image.

This is my class that generates the txt:

public static void gerarTxt(List<Contrato> lista) {

        try {
            FileWriter arq = new FileWriter("C:\\etiqueta.txt");
            PrintWriter gravarArq = new PrintWriter(arq);
            for (Contrato item : lista) {
                gravarArq.print(item.getContrato());
                gravarArq.print("\r\n");
                gravarArq.print(item.getContratante());
                gravarArq.print("\r\n");
                gravarArq.print(item.getRua().trim()+", "+item.getNumero());
                gravarArq.print("\r\n");
                gravarArq.print(item.getBairro());
                gravarArq.print("\r\n");
                gravarArq.print(item.getCep() + " "+item.getCidade()+ " "+StringUtils.leftPad(item.getUf(), 22));
                gravarArq.print("\r\n");
                gravarArq.print(".");
                gravarArq.print("\r\n");
            }
            arq.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

How can I turn these rows into columns?

---

Update

Example of the Github project: https://github.com/sinkz/EtiquetaTeste

Answer 1

If you know the width of the Column and it is fixed (I assume so, because it is for a matrix printer), you can use the method Stringutils.rightPad.

Either way you will have to work with more than one list record at the same time. For example:

for (int i = 0; i < lista.size(); i + 2) {
    Contato c1 = lista.get(i);
    Contato c2 = lista.get(i + 1);

    metodoQueVaiEscreverOText(c1, c2);

}

Still, you need to control the size of the array and the index to avoid outofboud.

Anything pastes your code and data examples to enrich the example.

Good luck