This standalone java code will enable us to write PDF files using JAVA API

WritePdf.java

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package com.milind.word.to.pdf;
import com.itextpdf.text.BadElementException;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Chunk;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Font;
import com.itextpdf.text.List;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
/**
 *
 * @author milind
 */
public class WritePdf {

    public static void main(String[] args) throws DocumentException, BadElementException, IOException {
        try {
            File file = new File("D:\\mypdf.pdf");
            FileOutputStream fileout = new FileOutputStream(file);
            Document document = new Document();
            PdfWriter.getInstance(document, fileout);
            document.addAuthor("Milind");
            document.addTitle("My PDF File");
            document.open();
            Chunk chunk = new Chunk("Milind Jagre");
            Font font = new Font();
            font.setStyle(Font.UNDERLINE);
            font.setStyle(Font.ITALIC);
            chunk.setFont(font);
            chunk.setBackground(BaseColor.CYAN);
            document.add(chunk);
            Paragraph paragraph = new Paragraph();
            paragraph.add("Hello World");
            paragraph.setAlignment(Element.ALIGN_CENTER);
            document.add(paragraph);
            List list = new List(true, 15);
            list.add("Bangalore");
            list.add("Nagpur");
            document.add(list);
            document.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}