java - How to set text @ absolute position in the PDF Document using iText -

i trying use @aaronbartell example, place text @ required (absolute) position in pdf document. please give me direction, thanks.

example:

private static void abstext(string text, int x, int y) {   try {     pdfcontentbyte cb = writer.getdirectcontent();     basefont bf = basefont.createfont(basefont.helvetica, basefont.cp1252, basefont.not_embedded);     cb.savestate();     cb.begintext();     cb.movetext(x, y);     cb.setfontandsize(bf, 12);     cb.showtext(text);     cb.endtext();     cb.restorestate();   } catch (documentexception e) {     e.printstacktrace();   } catch (ioexception e) {     e.printstacktrace();   } } 

if use itext, create pdf document in 5 steps"

1. create document instance
2. create pdfwriter instance
3. open document
4. add content
5. close document

in question, not create pdfwriter instance (unless it's global variable). in comment, not open document (you've skipped step 3 , step essential in document creation process).

take code comment, , add following line @ appropriate place:

document.open(); 

the appropriate place after line create pdfwriter instance , before start using writer instance.

update

in comment, sharing code contains logical error.

your main method pdfgeneration() (probably) contains 5 steps in creating process:

1. you create document instance
2. you create pdfwriter instance writes bytes file my first pdf doc.pdf
3. you open document
4. you call method setpara() supposed add content
5. you close document (not visible in code)

the logical error can found in setpara() method. in method, repeat 5 steps. create new document instance (there's no need this) , create new pdfwriter instance creates new file my first pdf doc.pdf. throws exception, because file in use!

you should change setpara() this:

public void setpara(pdfcontentbyte canvas, phrase p, float x, float y) {     columntext.showtextaligned(canvas, element.align_left, phrase, x, y, 0); } 

you should call method main method this:

setpara(writer.getdirectcontent(), new phrase(text), x, y); 

of course: setpara() method little more reduced version of showtextaligned() method exists in itext, may want use method directly. instance: use in main method, instead of introducing setpara() method:

phrase phrase = new phrase("some text", new font()); pdfcontentbyte canvas = writer.getdirectcontent(); columntext.showtextaligned(canvas, element.align_left, phrase, 20, 20, 0);