Create a PDF Document in Java

import com.spire.pdf.graphics.*;

import java.awt.*;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.*;

public class CreatePdfDocument {

    public static void main(String[] args) throws FileNotFoundException, IOException  {

        //create a PdfDocument object
        PdfDocument doc = new PdfDocument();

        //add a page
        PdfPageBase page = doc.getPages().add();

        //heading text
        String heading = "Java - Overview";

        //create solid brush objects
        PdfSolidBrush brush1 = new PdfSolidBrush(new PdfRGBColor(Color.BLUE));
        PdfSolidBrush brush2 = new PdfSolidBrush(new PdfRGBColor(Color.BLACK));

        //create true type font objects
        PdfTrueTypeFont font1= new PdfTrueTypeFont(new Font("Times New Roman",Font.PLAIN,20));
        PdfTrueTypeFont font2= new PdfTrueTypeFont(new Font("Arial Unicode MS",Font.PLAIN,12));

        //set the text alignment via PdfStringFormat class
        PdfStringFormat format1 = new PdfStringFormat();
        format1.setAlignment(PdfTextAlignment.Center);

        //draw heading on the center of the page
        page.getCanvas().drawString(heading, font1, brush1, new Point2D.Float((float)page.getActualBounds(true).getWidth()/2, 0),format1);

        //get body text from a .txt file
        String body = readFileToString("C:\\Users\\Administrator\\Desktop\\body.txt");

        //create a PdfTextWidget object
        PdfTextWidget widget = new PdfTextWidget(body, font2, brush2);

        //create a rectangle where the body text will be placed
        Rectangle2D.Float rect = new Rectangle2D.Float(0, 30, (float)page.getActualBounds(true).getWidth(),(float)page.getActualBounds(true).getHeight());

        //set the PdfLayoutType to Paginate to make the content paginated automatically
        PdfTextLayout layout = new PdfTextLayout();
        layout.setLayout(PdfLayoutType.Paginate);

        //draw body text on the page
        widget.draw(page, rect, layout);

        //save to file
        doc.saveToFile("output/CreatePdf.pdf");
    }

    //customize a function to read TXT file to String
    private static String readFileToString(String filepath) throws FileNotFoundException, IOException {

        StringBuilder sb = new StringBuilder();
        String s ="";
        BufferedReader br = new BufferedReader(new FileReader(filepath));

        while( (s = br.readLine()) != null) {
            sb.append(s + "\n");
        }
        br.close();
        String str = sb.toString();
        return str;
    }
}