Add a highlight annotation to a PDF in Java

To add a highlight annotation to a PDF Document page.

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

// Create a highlight
Highlight hl = Highlight.create(doc, new Rect(100, 490, 150, 515));
hl.setColor(new ColorPt(0, 1, 0), 3);
hl.refreshAppearance();
page.annotPushBack(hl);

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).