PDFBoxDemo1.java

import java.io.File;
import java.io.IOException;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectImage;

public class Main {

	public static void main(String[] args) throws IOException {
		PDDocument pdDocument = new PDDocument();

		PDPage page1 = new PDPage(PDRectangle.A4);
		pdDocument.addPage(page1);
		
		String text="Hello World!";
		PDFont font=PDType1Font.TIMES_ROMAN;
		float fontSize = 48f;
		
		float pageHeight = page1.getMediaBox().getUpperRightY();
		float pageWidth = page1.getMediaBox().getUpperRightX();
		float textWidth=font.getStringWidth(text)/1000*(fontSize);
		float textX = (pageWidth/2) - (textWidth/2);
		float textY = (pageHeight/2) - (fontSize/2);
		System.out.println(font.getStringWidth("Q"));
		PDPageContentStream contentStream=new PDPageContentStream(pdDocument, page1);
		contentStream.beginText();
		contentStream.setFont(font, fontSize);
		contentStream.newLineAtOffset(textX, textY);
		contentStream.showText(text);
		contentStream.endText();
		PDImageXObject javaLogo=PDImageXObject.createFromFile(("java.png"), pdDocument);
		float imgSquareSize=200;
		contentStream.drawImage(javaLogo, (pageWidth/2) - (imgSquareSize/2), textY-imgSquareSize,imgSquareSize, imgSquareSize);
		contentStream.close();
		pdDocument.save("new.pdf");
		pdDocument.close();
	}
}