title: How to get line thickness less than 1 with PDFBox
body: <p>I have been trying to draw a thin horizontal line with PDFBox, but it appears that there is a limit for how thin I can draw the line. If I use a value less than one for the line thickness it looks the same as when I provide one for the value. Is this a limitation with PDFBox, or do I need to do something different?</p>
  
  <pre><code>// This looks the same as providing 1 for setLineWidth()
  contentStream.setLineWidth(0.5f);
  contentStream.setStrokingColor(Color.BLACK);
  contentStream.moveTo(40f, 30f);
  contentStream.lineTo(570f, 30f);
  contentStream.closeAndStroke();
  </code></pre>