Edit annotation style properties in Java

To set an annotation style property such as color, interior color, border style, padding, etc to an annotation.

PDFDoc doc = new PDFDoc(filename);
Page page = doc.getPage(1);

Circle circle = Circle.create(doc, new Rect(100, 100, 200, 200));
circle.setColor(new ColorPt(0, 1, 0), 3);
circle.setInteriorColor(new ColorPt(0, 0, 1), 3);
double[] dash = {2, 4};
circle.setBorderStyle(new Annot.BorderStyle(Annot.BorderStyle.e_dashed, 3, 0, 0, dash));
circle.setPadding(2);
circle.refreshAppearance();
page.annotPushBack(circle);

Add or edit PDF annotations sample
Full code sample which shows how to add or edit PDF annotations (e.g. hyperlink, intra-document link, stamp, rubber stamp, file attachment, sound, text, free-text, line, circle, square, polygon, polyline, highlight, squiggly, caret, and ink).