Here is Code which I am using...
Paragraph p1 = new Paragraph("Hi! I am generating my first PDF using DroidText");
Font paraFont = new Font(Font.COURIER,20.0f,Color.GREEN);
p1.setAlignment(Paragraph.ALIGN_CENTER);
p1.setFont(font1);
doc.add(p1);
this helped me to resolve my problem..
Font paraFont = new Font(Font.COURIER,20.0f,Color.GREEN);
Paragraph p1 = new Paragraph("Hi! I am generating my first PDF using DroidText",paraFont);
doc.add(p1);