how to set the text position in pdfbox - servlets

Question

i have use pdfbox for creating pdf but not getting sure how to set the text in x and y it will not come in proper format
PDDocument document=new PDDocument();
PDPage blank=new PDPage();
PDFont font=PDType1Font.HELVETICA_BOLD;
document.addPage(blank);
PDPageContentStream content=new PDPageContentStream(document, blank);
content.beginText();
int i=0;
int x=20;
int y=700;
while(i<5){
content. newLineAtOffset(x, y);
content.setFont(font, 12);
content.showText(id);
content.showText(role);
i++;
y=-20;
}
content.endText();
content.close();
document.save("BlankPage.pdf");
document.close();[it will increase x and i dont want to increase possition of x][1]
[1]: http://i.stack.imgur.com/Q1A6I.jpg

Answer 1

Unfortunately the OP has not explained what exactly he means by not coming in proper format.
Looking at his code, though, it seems like he thinks
content.newLineAtOffset(x, y);
will position the new line at the given x, y as absolute coordinates. This is not the case. Instead x, y are relative to the previous line coordinates which are set to 0, 0 in the PDF instruction generated by content.beginText().
This actually already is hinted at by the Offset in newLineAtOffset and made clear in the JavaDocs:
/**
* The Td operator.
* Move to the start of the next line, offset from the start of the current line by (tx, ty).
*
* #param tx The x translation.
* #param ty The y translation.
* #throws IOException If there is an error writing to the stream.
* #throws IllegalStateException If the method was not allowed to be called at this time.
*/
public void newLineAtOffset(float tx, float ty) throws IOException
Thus, most likely he wants do something like
int x=20;
int y=700;
content.beginText();
content.setFont(font, 12);
content.newLineAtOffset(x, y);
for (int i=0; i<5; i++)
{
content.showText(id);
content.showText(role);
content.newLineAtOffset(0, -20);
}
content.endText();