How to use a dotted line as a cell border?

I've made an example that solves your problem: DottedLineCell. The resulting PDF is a document with two tables. For the first table, we use a table renderer:

##GITHUB:https://github.com/itext/itext-publications-examples-java/blob/master/src/main/java/com/itextpdf/samples/sandbox/tables/DottedLineCell.java|92-141##

This is the most elegant way to draw the cell borders, as it uses only one stroke() operator for all the lines. Unfortunately, this solution isn't an option if you have tables with rowspans. The second table uses a cell renderer:

##GITHUB:https://github.com/itext/itext-publications-examples-java/blob/master/src/main/java/com/itextpdf/samples/sandbox/tables/DottedLineCell.java|143-163##

With a cell event, a border is drawn around every cell. This means you'll have multiple stroke() operators and overlapping lines. However: this solution always works, also when the table has cells with a rowspan greater than one.

Click this link if you want to see how to answer this question in iText 5.